Focus on:
All days
May 3, 2019
May 4, 2019
May 5, 2019
May 6, 2019
May 7, 2019
May 8, 2019
May 9, 2019
May 10, 2019
May 11, 2019
May 12, 2019
Compact style
Indico style
Indico style  inline minutes
Indico style  numbered
Indico style  numbered + minutes
Indico Weeks View
Back to Conference View
Choose Timezone
Use the event/category timezone
Specify a timezone
Africa/Abidjan
Africa/Accra
Africa/Addis_Ababa
Africa/Algiers
Africa/Asmara
Africa/Bamako
Africa/Bangui
Africa/Banjul
Africa/Bissau
Africa/Blantyre
Africa/Brazzaville
Africa/Bujumbura
Africa/Cairo
Africa/Casablanca
Africa/Ceuta
Africa/Conakry
Africa/Dakar
Africa/Dar_es_Salaam
Africa/Djibouti
Africa/Douala
Africa/El_Aaiun
Africa/Freetown
Africa/Gaborone
Africa/Harare
Africa/Johannesburg
Africa/Juba
Africa/Kampala
Africa/Khartoum
Africa/Kigali
Africa/Kinshasa
Africa/Lagos
Africa/Libreville
Africa/Lome
Africa/Luanda
Africa/Lubumbashi
Africa/Lusaka
Africa/Malabo
Africa/Maputo
Africa/Maseru
Africa/Mbabane
Africa/Mogadishu
Africa/Monrovia
Africa/Nairobi
Africa/Ndjamena
Africa/Niamey
Africa/Nouakchott
Africa/Ouagadougou
Africa/PortoNovo
Africa/Sao_Tome
Africa/Tripoli
Africa/Tunis
Africa/Windhoek
America/Adak
America/Anchorage
America/Anguilla
America/Antigua
America/Araguaina
America/Argentina/Buenos_Aires
America/Argentina/Catamarca
America/Argentina/Cordoba
America/Argentina/Jujuy
America/Argentina/La_Rioja
America/Argentina/Mendoza
America/Argentina/Rio_Gallegos
America/Argentina/Salta
America/Argentina/San_Juan
America/Argentina/San_Luis
America/Argentina/Tucuman
America/Argentina/Ushuaia
America/Aruba
America/Asuncion
America/Atikokan
America/Bahia
America/Bahia_Banderas
America/Barbados
America/Belem
America/Belize
America/BlancSablon
America/Boa_Vista
America/Bogota
America/Boise
America/Cambridge_Bay
America/Campo_Grande
America/Cancun
America/Caracas
America/Cayenne
America/Cayman
America/Chicago
America/Chihuahua
America/Costa_Rica
America/Creston
America/Cuiaba
America/Curacao
America/Danmarkshavn
America/Dawson
America/Dawson_Creek
America/Denver
America/Detroit
America/Dominica
America/Edmonton
America/Eirunepe
America/El_Salvador
America/Fort_Nelson
America/Fortaleza
America/Glace_Bay
America/Goose_Bay
America/Grand_Turk
America/Grenada
America/Guadeloupe
America/Guatemala
America/Guayaquil
America/Guyana
America/Halifax
America/Havana
America/Hermosillo
America/Indiana/Indianapolis
America/Indiana/Knox
America/Indiana/Marengo
America/Indiana/Petersburg
America/Indiana/Tell_City
America/Indiana/Vevay
America/Indiana/Vincennes
America/Indiana/Winamac
America/Inuvik
America/Iqaluit
America/Jamaica
America/Juneau
America/Kentucky/Louisville
America/Kentucky/Monticello
America/Kralendijk
America/La_Paz
America/Lima
America/Los_Angeles
America/Lower_Princes
America/Maceio
America/Managua
America/Manaus
America/Marigot
America/Martinique
America/Matamoros
America/Mazatlan
America/Menominee
America/Merida
America/Metlakatla
America/Mexico_City
America/Miquelon
America/Moncton
America/Monterrey
America/Montevideo
America/Montserrat
America/Nassau
America/New_York
America/Nipigon
America/Nome
America/Noronha
America/North_Dakota/Beulah
America/North_Dakota/Center
America/North_Dakota/New_Salem
America/Nuuk
America/Ojinaga
America/Panama
America/Pangnirtung
America/Paramaribo
America/Phoenix
America/PortauPrince
America/Port_of_Spain
America/Porto_Velho
America/Puerto_Rico
America/Punta_Arenas
America/Rainy_River
America/Rankin_Inlet
America/Recife
America/Regina
America/Resolute
America/Rio_Branco
America/Santarem
America/Santiago
America/Santo_Domingo
America/Sao_Paulo
America/Scoresbysund
America/Sitka
America/St_Barthelemy
America/St_Johns
America/St_Kitts
America/St_Lucia
America/St_Thomas
America/St_Vincent
America/Swift_Current
America/Tegucigalpa
America/Thule
America/Thunder_Bay
America/Tijuana
America/Toronto
America/Tortola
America/Vancouver
America/Whitehorse
America/Winnipeg
America/Yakutat
America/Yellowknife
Antarctica/Casey
Antarctica/Davis
Antarctica/DumontDUrville
Antarctica/Macquarie
Antarctica/Mawson
Antarctica/McMurdo
Antarctica/Palmer
Antarctica/Rothera
Antarctica/Syowa
Antarctica/Troll
Antarctica/Vostok
Arctic/Longyearbyen
Asia/Aden
Asia/Almaty
Asia/Amman
Asia/Anadyr
Asia/Aqtau
Asia/Aqtobe
Asia/Ashgabat
Asia/Atyrau
Asia/Baghdad
Asia/Bahrain
Asia/Baku
Asia/Bangkok
Asia/Barnaul
Asia/Beirut
Asia/Bishkek
Asia/Brunei
Asia/Chita
Asia/Choibalsan
Asia/Colombo
Asia/Damascus
Asia/Dhaka
Asia/Dili
Asia/Dubai
Asia/Dushanbe
Asia/Famagusta
Asia/Gaza
Asia/Hebron
Asia/Ho_Chi_Minh
Asia/Hong_Kong
Asia/Hovd
Asia/Irkutsk
Asia/Jakarta
Asia/Jayapura
Asia/Jerusalem
Asia/Kabul
Asia/Kamchatka
Asia/Karachi
Asia/Kathmandu
Asia/Khandyga
Asia/Kolkata
Asia/Krasnoyarsk
Asia/Kuala_Lumpur
Asia/Kuching
Asia/Kuwait
Asia/Macau
Asia/Magadan
Asia/Makassar
Asia/Manila
Asia/Muscat
Asia/Nicosia
Asia/Novokuznetsk
Asia/Novosibirsk
Asia/Omsk
Asia/Oral
Asia/Phnom_Penh
Asia/Pontianak
Asia/Pyongyang
Asia/Qatar
Asia/Qostanay
Asia/Qyzylorda
Asia/Riyadh
Asia/Sakhalin
Asia/Samarkand
Asia/Seoul
Asia/Shanghai
Asia/Singapore
Asia/Srednekolymsk
Asia/Taipei
Asia/Tashkent
Asia/Tbilisi
Asia/Tehran
Asia/Thimphu
Asia/Tokyo
Asia/Tomsk
Asia/Ulaanbaatar
Asia/Urumqi
Asia/UstNera
Asia/Vientiane
Asia/Vladivostok
Asia/Yakutsk
Asia/Yangon
Asia/Yekaterinburg
Asia/Yerevan
Atlantic/Azores
Atlantic/Bermuda
Atlantic/Canary
Atlantic/Cape_Verde
Atlantic/Faroe
Atlantic/Madeira
Atlantic/Reykjavik
Atlantic/South_Georgia
Atlantic/St_Helena
Atlantic/Stanley
Australia/Adelaide
Australia/Brisbane
Australia/Broken_Hill
Australia/Darwin
Australia/Eucla
Australia/Hobart
Australia/Lindeman
Australia/Lord_Howe
Australia/Melbourne
Australia/Perth
Australia/Sydney
Canada/Atlantic
Canada/Central
Canada/Eastern
Canada/Mountain
Canada/Newfoundland
Canada/Pacific
Europe/Amsterdam
Europe/Andorra
Europe/Astrakhan
Europe/Athens
Europe/Belgrade
Europe/Berlin
Europe/Bratislava
Europe/Brussels
Europe/Bucharest
Europe/Budapest
Europe/Busingen
Europe/Chisinau
Europe/Copenhagen
Europe/Dublin
Europe/Gibraltar
Europe/Guernsey
Europe/Helsinki
Europe/Isle_of_Man
Europe/Istanbul
Europe/Jersey
Europe/Kaliningrad
Europe/Kiev
Europe/Kirov
Europe/Lisbon
Europe/Ljubljana
Europe/London
Europe/Luxembourg
Europe/Madrid
Europe/Malta
Europe/Mariehamn
Europe/Minsk
Europe/Monaco
Europe/Moscow
Europe/Oslo
Europe/Paris
Europe/Podgorica
Europe/Prague
Europe/Riga
Europe/Rome
Europe/Samara
Europe/San_Marino
Europe/Sarajevo
Europe/Saratov
Europe/Simferopol
Europe/Skopje
Europe/Sofia
Europe/Stockholm
Europe/Tallinn
Europe/Tirane
Europe/Ulyanovsk
Europe/Uzhgorod
Europe/Vaduz
Europe/Vatican
Europe/Vienna
Europe/Vilnius
Europe/Volgograd
Europe/Warsaw
Europe/Zagreb
Europe/Zaporozhye
Europe/Zurich
GMT
Indian/Antananarivo
Indian/Chagos
Indian/Christmas
Indian/Cocos
Indian/Comoro
Indian/Kerguelen
Indian/Mahe
Indian/Maldives
Indian/Mauritius
Indian/Mayotte
Indian/Reunion
Pacific/Apia
Pacific/Auckland
Pacific/Bougainville
Pacific/Chatham
Pacific/Chuuk
Pacific/Easter
Pacific/Efate
Pacific/Enderbury
Pacific/Fakaofo
Pacific/Fiji
Pacific/Funafuti
Pacific/Galapagos
Pacific/Gambier
Pacific/Guadalcanal
Pacific/Guam
Pacific/Honolulu
Pacific/Kiritimati
Pacific/Kosrae
Pacific/Kwajalein
Pacific/Majuro
Pacific/Marquesas
Pacific/Midway
Pacific/Nauru
Pacific/Niue
Pacific/Norfolk
Pacific/Noumea
Pacific/Pago_Pago
Pacific/Palau
Pacific/Pitcairn
Pacific/Pohnpei
Pacific/Port_Moresby
Pacific/Rarotonga
Pacific/Saipan
Pacific/Tahiti
Pacific/Tarawa
Pacific/Tongatapu
Pacific/Wake
Pacific/Wallis
US/Alaska
US/Arizona
US/Central
US/Eastern
US/Hawaii
US/Mountain
US/Pacific
UTC
Cuba
Save
Cuba
English (United States)
English (United Kingdom)
English (United States)
Español (España)
Français (France)
Polski (Polska)
Português (Brasil)
Türkçe (Türkiye)
Монгол (Монгол)
Українська (Україна)
中文 (中国)
Login
STARS2019 / SMFNS2019
from
Friday, May 3, 2019 (4:00 AM)
to
Sunday, May 12, 2019 (6:00 PM)
Monday, April 29, 2019
Tuesday, April 30, 2019
Wednesday, May 1, 2019
Thursday, May 2, 2019
Friday, May 3, 2019
2:00 PM
SCHOOL REGISTRATION AND OPENING
SCHOOL REGISTRATION AND OPENING
2:00 PM  2:30 PM
2:30 PM
Compact stars for undergraduates, Marcus Bleicher (University Frankfurt, Germany)
Compact stars for undergraduates, Marcus Bleicher (University Frankfurt, Germany)
2:30 PM  3:30 PM
3:30 PM
COFFEE BREAK
COFFEE BREAK
3:30 PM  4:00 PM
4:00 PM
Cosmic matter in the Lab, Christian Sturm (GSI, Germany)
Cosmic matter in the Lab, Christian Sturm (GSI, Germany)
4:00 PM  5:00 PM
Saturday, May 4, 2019
10:00 AM
Accretion disc physics and black holes, Thomas Boller (MPE Garching, Germany)
Accretion disc physics and black holes, Thomas Boller (MPE Garching, Germany)
10:00 AM  11:00 AM
11:00 AM
COFFEE BREAK
COFFEE BREAK
11:00 AM  11:30 AM
11:30 AM
Introduction to modern hydrodynamics, Markus Garbiso (University of Alabama, USA)
Introduction to modern hydrodynamics, Markus Garbiso (University of Alabama, USA)
11:30 AM  12:30 PM
Sunday, May 5, 2019
12:00 PM
ARRIVAL OF PARTICIPANTS
ARRIVAL OF PARTICIPANTS
12:00 PM  6:00 PM
6:00 PM
REGISTRATION
REGISTRATION
6:00 PM  8:00 PM
Monday, May 6, 2019
9:00 AM
OPENING STARS2019
OPENING STARS2019
9:00 AM  9:20 AM
9:20 AM
Education and Cultural Astronomy

Steven Gullberg
(University of Oklahoma)
Education and Cultural Astronomy
(STARS)
Steven Gullberg
(University of Oklahoma)
9:20 AM  10:00 AM
The importance of including a thorough search for the potential use of astronomy in the examination of any culture is discussed. Educational strategies are included that can enable scholars to add related research knowledge that will enable them to augment their studies in this pursuit. What can be learned from astronomy in culture is examined and the importance of including such research as a part of certain studies is emphasized. A primary goal is to help scholars to learn more about the research of astronomy in culture with the goal of increasing the numbers of those engaged with this in strong research and publication. Educational strategies and emerging programs will be discussed. Such educational initiatives will greatly strengthen this research in the future and will facilitate significant advancements in what we know about the astronomy of ancient and indigenous cultures worldwide.
10:00 AM
Exact magnetic contribution to a oneloop charged scalar field potential

Gabriella Piccinelli Bocchi
(Centro Tecnológico, FES Aragón, UNAM)
Exact magnetic contribution to a oneloop charged scalar field potential
(STARS)
Gabriella Piccinelli Bocchi
(Centro Tecnológico, FES Aragón, UNAM)
10:00 AM  10:20 AM
In the context of a warm inflation scenario, we explore the effect of a primordial magnetic field on a charged scalar field potential.
10:20 AM
Black holes fueling and coalescence in galaxy mergers

Andrés Escala
(Universidad de Chile)
Black holes fueling and coalescence in galaxy mergers
(STARS)
Andrés Escala
(Universidad de Chile)
10:20 AM  10:40 AM
Using a combination of Smooth Particle hydrodynamics and Adaptive Mesh Refinement simulations of galaxy mergers, with subparsecs scale resolution, we have study both the mass transport process onto the massive black holes throughout a galactic merger and especially, the posible black holes coalescence at galactic center. The final coalescence of these black holes lead to gravitational radiation emission that would be detectable up to high redshift by future gravitational wave experiment such as eLISA, which is expected to be launched in 2034.
10:40 AM
COFFEE BREAK AND POSTER SESSION
COFFEE BREAK AND POSTER SESSION
10:40 AM  11:30 AM
11:30 AM
A breakthrough for the study of resolved stellar populations with ELTMOS/MOSAIC

Roth Martin
(LeibnizInstitut für Astrophysik Potsdam (AIP))
A breakthrough for the study of resolved stellar populations with ELTMOS/MOSAIC
(STARS)
Roth Martin
(LeibnizInstitut für Astrophysik Potsdam (AIP))
11:30 AM  12:00 PM
The study of resolved stellar populations in nearby galaxies outside of the Local Group has come within reach with the new generation of extremely large telescopes, featuring primary mirror diameters on the order of 30 meters. ELT, the European Extremely Large Telescope, is currently being built at the Armazones site in the Atacama desert of Chile. From the instrumentation suite for the ELT, the multiobject spectrograph ELTMOS stands out with the capability of combining the large light collecting power with adaptive optics over the entire fieldofview of the ELT, thus becoming the perfect instrument to study the spectra of resolved stars in galaxies beyond the Milky Way and the Local Group. With an emphasis of the stellar science case, the instrument at the stage of the completed PhaseA study will be presented and discussed, in particular with a focus on the synergy potential with the MICADO imager at the ELT, and the MUSE IFU at the VLT.
12:00 PM
Observation of rprocess abundance patterns in stars

Norbert Christlieb
(Universität Heidelberg)
Observation of rprocess abundance patterns in stars
(STARS)
Norbert Christlieb
(Universität Heidelberg)
12:00 PM  12:30 PM
Stars conserve in their atmospheres, to a large extent, the chemical composition of the gas cloud from which they formed. The chemical compositions of old, metalpoor stars in the halo of our galaxy can hence be used for reconstructing the chemical enrichment history of the Milky Way, and studying the nucleosynthesis processes that contributed to the enrichment. For example, a unique abundance signature of the rapid neutroncapture process (rprocess) has been observed in metalpoor stars strongly enriched in rprocess elements, providing constraints on rprocess models and the physical conditions of the site of this process. In my talk I will review the recent progress that has been made in identifying large samples of metalpoor stars by means of wideangle sky surveys, determinations of their chemical compositions with optical highresolution spectra and stateofthe art stellar model atmospheres, and future prospects in the era of 410m telescopes equipped with highly multiplexed spectrographs, as well as the next generation of large groundbased telescopes currently under construction.
12:30 PM
LUNCH
LUNCH
12:30 PM  2:30 PM
2:30 PM
Can the symmetry breaking in the SM be determined by the “second minimum” of the Higgs potential?

Alejandro Cabo
(Department of Theoretical Physics )
Can the symmetry breaking in the SM be determined by the “second minimum” of the Higgs potential?
(STARS)
Alejandro Cabo
(Department of Theoretical Physics )
2:30 PM  2:50 PM
The possibility that the spontaneous symmetry breaking in the Standard Model (SM) may be generated by the TopHiggs Yukawa interaction (which determines the so called “second minimum” in the SM) is investigated. A former analysis about a QCD action only including the Yukawa interaction of a single quark with a scalar field is here extended. We repeat the calculation done in that study of the two loop effective action for the scalar field of the mentioned model. A correction of the former evaluation allowed to select a strong coupling \alpha(m,LQCD) = 0.2254 GeV at an intermediate scale \mu = 11.63 GeV, in order to fix the minimum of the potential at a scalar mean field determining 175 GeV for the quark mass. Next, a scalar field mass m = 44 GeV is evaluated, which is also of the order of the experimental Higgs mass. The work is also considering the effects of employing a running with momenta strong coupling. For this purpose, the finite part of the two loop potential contribution determined by the strong coupling, was represented as a momentum integral. Next, substituting in this integral the experimental values of the running coupling, the minimum of the potential curve as a function of the mean field was again fixed to the top quark mass by reducing the scale to the value \mu = 4.95 GeV. The consideration of the running coupling also deepened the potential value at the minimum and slightly increased the mass of the scalar field up to 53.58 GeV. These results rested in assuming that the low momentum dependence of the coupling is “saturated” to a constant value being close to its experimental value at the lowest momentum measured.
2:50 PM
Magnetic fielddependence of the neutral pion mass in the linear sigma model coupled to quarks: The weak field case

Daryel Manreza Paret
(Facultad de Física, Universidad de La Habana)
Magnetic fielddependence of the neutral pion mass in the linear sigma model coupled to quarks: The weak field case
(STARS)
Daryel Manreza Paret
(Facultad de Física, Universidad de La Habana)
2:50 PM  3:10 PM
We compute the neutral pion mass dependence on a magnetic field in the weak field approximation at oneloop order. The calculation is carried out within the linear sigma model coupled to quarks and using Schwinger's propertime representation for the charged particle propagators. We find that the neutral pion mass decreases with the field strength provided the boson selfcoupling magnetic field corrections are also included. The calculation should be regarded as the setting of the trend for the neutral pion mass as the magnetic field is turned on.
3:10 PM
Exact configurations for interacting spin2 fields in three dimensions

Elizabeth Rodríguez Querts
(ICIMAF)
Exact configurations for interacting spin2 fields in three dimensions
(STARS)
Elizabeth Rodríguez Querts
(ICIMAF)
3:10 PM  3:30 PM
We studied some exact configurations for the threedimensional massive multigravity theory called "Vieldreibein gravity". We find AdS wave solutions (which reflect the main dynamic properties of the model) and analyze their asymptotic behavior. In addition, we explore the existence of black holes in the context of this theory.
3:30 PM
Cosmogenic photon and neutrino fluxes in the Auger era

Rogerio de Almeida
(Universidade Federal Fluminense)
Cosmogenic photon and neutrino fluxes in the Auger era
(STARS)
Rogerio de Almeida
(Universidade Federal Fluminense)
3:30 PM  3:50 PM
The interaction of ultrahighenergy cosmic rays (UHECRs) with pervasive photon fields generates associated cosmogenic fluxes of neutrinos and photons due to photohadronic and photonuclear processes taking place in the intergalactic medium. We perform a fit of the UHECR spectrum and composition measured by the Pierre Auger Observatory for four source emissivity scenarios: powerlaw redshift dependence with one free parameter, active galactic nuclei, gammaray bursts, and star formation history. We show that negative source emissivity evolution is favoured if we treat the source evolution as a free parameter. In all cases, the best fit is obtained for relatively hard spectral indices and low maximal rigidities, for compositions at injection dominated by intermediate nuclei (nitrogen and silicon groups). In light of these results, we calculate the associated fluxes of neutrinos and photons. Finally, we discuss the prospects for the future generation of highenergy neutrino and gammaray observatories to constrain the sources of UHECRs.
3:50 PM
Effective potential of a higher derivative scalar field theory at finite temperature

Angel Sánchez
(Facultad de Ciencias, UNAM)
Effective potential of a higher derivative scalar field theory at finite temperature
(STARS)
Angel Sánchez
(Facultad de Ciencias, UNAM)
3:50 PM  4:10 PM
In this contribution, I present the study of the effect of higher derivative terms in the effective potential of a scalar field theory. Preliminary results indicate that quantum correction coming from the higher derivative terms make the curvature of the effective potential, near the origin, becomes flatter. I will discuss how this result could be interesting within a warm inflation scenario.
4:10 PM
Charges and torsion

Ernesto Frodden
Charges and torsion
(STARS)
Ernesto Frodden
4:10 PM  4:30 PM
We review the surface charge method in the EinsteinCartan formalism and study in particular the role of torsion in the computation of charges. An example in 2+1 gravity is worked out explicitly and some advances in the EinsteinCartanDirac theory are presented.
4:30 PM
COFFEE BREAK AND POSTER SESSION
COFFEE BREAK AND POSTER SESSION
4:30 PM  5:00 PM
5:00 PM
FREE
FREE
5:00 PM  7:00 PM
7:00 PM
WELCOME COCKTAIL
WELCOME COCKTAIL
7:00 PM  8:00 PM
Tuesday, May 7, 2019
9:00 AM
Scale Invariance in Cosmology and Particle Physics using metric independent measures of integrations in the action

Eduardo Guendelman
(Ben Gurion University)
Scale Invariance in Cosmology and Particle Physics using metric independent measures of integrations in the action
(STARS)
Eduardo Guendelman
(Ben Gurion University)
9:00 AM  9:20 AM
Abstract The use of a metric independent measure of integration in the action opens new possibilities for constructing globally scale invariant theories, since the new measure can be assigned a different scaling transformation than the usual metric dependent measure sqrt(g). There are various ways to construct a density that can serve as a metric independent measure of integration, from the derivatives of 4 scalar fields or the derivative of a three index tensor field contracted with the alternating symbol. The integration of the equations of motion of these "measure fields" leads to the spontaneous breaking of the scale invariance. A dilaton field with exponential potentials is added and coupled to the different measures. In the effective Einstein frame, potentials for the dilaton with flat regions appear, if curvature square terms are introduced, two flat regions appear, one capable of describing inflation and the other describing the slowly accelerated phase of the present universe. These models allow non singular cosmologies of the emergent type. In the context of the late universe, it is shown that the scale invariance is responsible for the avoidance of the 5th force problem that could have appeared in connection with the nearly massless dilaton. Also a see saw cosmological mechanism that could explain the smallness of the present vacuum energy can be formulated. Finally these techniques have been used to formulate scale invariant extensions of the Standard Model.
9:20 AM
Divergencetype hyperbolic theories for ultrarelativistic fluids

Marcelo Enrique Rubio
(IATE  CONICET)
Divergencetype hyperbolic theories for ultrarelativistic fluids
(STARS)
Marcelo Enrique Rubio
(IATE  CONICET)
9:20 AM  9:40 AM
In this talk I will present a novel theory with the aim of describing the dynamics of ultrarelativistic fluids considering dissipative effects up to second order. The problem of achieving a covariant relativistic extension of the equations that describe nonrelativistic dissipative fluids constitutes a very active area of current research, given that a wellposed and causal theory of viscous fluids is essential for a better description of several astrophysical problems, as for example the coalescence of compact objects, which constitute nowadays the main source of gravitational wave production. After mentioning previous attempts for covariant extensions of viscous fluids, we will present a proposal for the study of the dynamic evolution of ultrarelative fluids. Then, we will show how to implement the equations of the theory numerically, using the KurganovTadmor centered method, which allows capturing discontinuous solutions that simulate shock waves, and show some simulations in the onedimensional case.
9:40 AM
Susceptibilities of strongly interacting matter in a finite volume

Christian Spieles
(Frankfurt Institute for Advanced Studies (FIAS))
Susceptibilities of strongly interacting matter in a finite volume
(STARS)
Christian Spieles
(Frankfurt Institute for Advanced Studies (FIAS))
9:40 AM  10:00 AM
We investigate possible finitevolume effects on baryon number susceptibilities of strongly interacting matter. Assuming that a hadronic and a deconfined phase both contribute to the thermodynamic state of a finite system due to fluctuations, it is found that the resulting shapes of the netbaryon number distributions deviate significantly from the infinite volume limit for a given temperature T and baryochemical potential μ_B. In particular, the constraint on colorsingletness for the finite quarkgluon phase contribution leads to a change of the temperature dependence of the susceptibilities in finite volumes. According to the model, the finitevolume effect depends qualitatively on the value of μ_B.
10:00 AM
Directed, elliptic and triangular flow of free protons and deuterons in Au+Au reactions at 1.23 A GeV

Paula Hillmann
Directed, elliptic and triangular flow of free protons and deuterons in Au+Au reactions at 1.23 A GeV
(STARS)
Paula Hillmann
10:00 AM  10:20 AM
Recently, the HADES experiment at GSI has provided preliminary data on the directed flow, $v_1$ elliptic flow, $v_2$ and triangular flow, $v_3$ of protons in Au+Au reactions at a beam energy of 1.23 A GeV. Here we present a theoretical discussion of these flow harmonics within the UrQMD transport approach. We show that all flow harmonics, including the triangular flow, provide a consistent picture of the expansion of the system, if potential interactions are taken into account. Cluster formation has a large contribution to the physics of collective flow. Therefore, the flow of deuterons and free protons are compared. Investigating the dependence of the flow harmonics on the nuclear interaction potentials it is shown that especially $v_3$ can serve as a sensitive probe for the nuclear equation of state at such low energies. The triangular flow and its excitation function with respect to the reactionplane were calculated for the first time and indicate a complex interplay of the timeevolution of the system and the initial conditions at low beamenergies. Our study also indicates a significant softening of the equation of state at beam energies above E lab > 7 A GeV which can be explored by at the future FAIR facility.
10:20 AM
Delta mass shift as a thermometer of kinetic decoupling in Au+Au reactions at 1.23 AGeV

Tom Reichert
(Institut für Theoretische Physik, Goethe Universität Frankfurt)
Delta mass shift as a thermometer of kinetic decoupling in Au+Au reactions at 1.23 AGeV
(STARS)
Tom Reichert
(Institut für Theoretische Physik, Goethe Universität Frankfurt)
10:20 AM  10:40 AM
The HADES experiment at GSI will soon provide data on the production and properties of ∆ baryons from Au+Au reactions at 1.23 AGeV. Using the UrQMD model, we predict the yield and spectra of ∆ resonances. In addition we show that one expects to observe a mass shift of the ∆ resonance on the order of 40 MeV in the reconstructable ∆ mass distribution. This mass shift can be understood in terms of late stage ∆ formation with limited kinetic energy. We show how the mass shift can be used to constrain the kinetic decoupling temperature of the system.
10:40 AM
COFFEE BREAK AND POSTER SESSION
COFFEE BREAK AND POSTER SESSION
10:40 AM  11:00 AM
11:00 AM
The phase diagram of the PolyakovNambuJonaLasinio approach

Joerg Aichelin
(Subatech/CNRS, France)
The phase diagram of the PolyakovNambuJonaLasinio approach
(STARS)
Joerg Aichelin
(Subatech/CNRS, France)
11:00 AM  11:30 AM
Recently we succeeded, by introducing an interaction between the gluon mean field (presented by the a function of the Polyakov loop) and quarks, to reproduce the lattice equation of state for zero chemical potential with the PolyakovNambuJonaLasinio model. Also, entropy density, interaction measure, energy density and the speed of sound are quite nicely reproduced. Even the first coefficient of the Taylor expansion of the lattice data with respect to the chemical potential is in the error bars of the lattice calculations. These findings are of great importance for future studies of heavy ion reactions because the PolyakovNambuJonaLasinio model can be extended to finite chemical potentials (where lattice calculations are not possible) without introducing any new parameter. In addition, it shows at large chemical potentials a first order phase transition. It provides therefore a basis for theoretical studies in the energy range of the future FAIR and NICA facilities where one expects that heavy ion collisions are characterized by a large chemical potential. It may also serve as a equation of state for gravitational wave studies.
11:30 AM
Exploring the partonic phase at finite chemical potential within an extended offshell transport approach

Elena Bratkovskaya
(GSI, Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany and Institute for Theoretical Physics, Johann Wolfgang GoetheUniversität, Frankfurt am Main, Germany)
Exploring the partonic phase at finite chemical potential within an extended offshell transport approach
(STARS)
Elena Bratkovskaya
(GSI, Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany and Institute for Theoretical Physics, Johann Wolfgang GoetheUniversität, Frankfurt am Main, Germany)
11:30 AM  12:00 PM
We extend the PartonHadronString Dynamics (PHSD) transport approach in the partonic sector by explicitly calculating the total and differential partonic scattering cross sections as a function of temperature $T$ and baryon chemical potential $\mu_B$ on the basis of the effective propagators and couplings from the Dynamical QuasiParticle Model (DQPM) that is matched to reproduce the equation of state of the partonic system above the deconfinement temperature $T_c$ from lattice QCD. The novel transport approach (PHSD5.0) thus incorporates no additional parameters compared to the default version PHSD4.0. We calculate the collisional widths for the partonic degrees of freedom at finite $T$ and $\mu_B$ in the timelike sector and conclude that the quasiparticle limit holds sufficiently well. Furthermore, the ratio of shear viscosity $\eta$ over entropy density $s$, i.e. $\eta/s$, is evaluated using the collisional widths and compared to lQCD calculations for $\mu_B$ = 0 as well. We find that the novel ratio $\eta/s$ does not differ very much from that calculated within the original DQPM on the basis of the Kubo formalism. Furthermore, there is only a very modest change of $\eta/s$ with the baryon chemical $\mu_B$ as a function of the scaled temperature $T/T_c(\mu_B)$. This also holds for a variety of hadronic observables from central A+A collisions in the energy range 5 GeV $\leq\sqrt{s_{NN}} \leq$ 200 GeV when implementing the differential cross sections into the PHSD approach. We only observe small differences in the antibaryon sector (${\bar p}, {\bar \Lambda}+{\bar \Sigma}^0$) at $\sqrt{s_{NN}}$ = 17.3 GeV and 200 GeV with practically no sensitivity of rapidity and $p_T$ distributions to the $\mu_B$ dependence of the partonic cross sections. Small variations in the strangeness sector are obtained in all studied collisional systems (A+A and C+Au), however, it will be very hard to extract a robust signal experimentally. Since we find only small traces of a $\mu_B$dependence in heavyion observables  although the effective partonic masses and widths as well as their partonic cross sections clearly depend on $\mu_B$  this implies that one needs a sizable partonic density and large spacetime QGP volume to explore the dynamics in the partonic phase. These conditions are only fulfilled at high bombarding energies where $\mu_B$ is, however, rather low. On the other hand, when decreasing the bombarding energy and thus increasing $\mu_B$, the hadronic phase becomes dominant and accordingly, it will be difficult to extract signals from the partonic dynamics based on "bulk" observables.
12:00 PM
Deuteron production in heavy ion collisions

Marcus Bleicher
(Uni Frankfurt)
Deuteron production in heavy ion collisions
(STARS)
Marcus Bleicher
(Uni Frankfurt)
12:00 PM  12:30 PM
In this talk, we discuss UrQMD phasespace coalescence calculations for the production of deuterons. We compare with available data for various reactions from the GSI/FAIR energy regime up to LHC. It is found that the production process of deuterons, as reflected in their rapidity and transverse momentum distributions in p+p, p+A and A+A collisions at a beam energies starting from the GSI energy regime around 1 AGeV and up to the LHC, are in good agreement with experimental data. We further explore the energy and centrality dependence of the d/p ratios. Finally, we discuss antideuteron production for selected systems. Overall, a good description of the experimental data is observed. The results are also compatible with thermal model estimates. We also discuss the production of hypermatter within the same approach and find sizable production rates at FAIR.
12:30 PM
LUNCH
LUNCH
12:30 PM  2:30 PM
2:30 PM
Oneloop divergences in 7D Einstein and 6D conformal gravities

Danilo Diaz
(Universidad Andrés Bello)
Oneloop divergences in 7D Einstein and 6D conformal gravities
(STARS)
Danilo Diaz
(Universidad Andrés Bello)
2:30 PM  2:50 PM
Within the context of AdS/CFT Correspondence, we first compute oneloop infrared (IR) divergences of 7D Einstein Gravity in a certain PoincaréEinstein background metric. We compute then the oneloop ultraviolet (UV) divergences of 6D Conformal Gravity on the boundary. We verify the equality of the above results that stems from the IRUV connection of the duality dictionary. Key ingredients are heat kernel techniques, factorization of the boundary higherderivative kinetic operator for the Weyl graviton on the 6D boundary Einstein metric and WKBexactness of the Einstein graviton in the chosen 7D PoincaréEinstein background. In all, we elucidate the way in which the 6D results containing the typeA and typeB conformal anomalies for the Weyl graviton are encoded in the 7D "hologram" given by the fluctuation determinant for the Einstein graviton. We finally discuss possible extensions to include higherspin fields.
2:50 PM
Generalized SU(2) Proca inflation

Yeinzon Rodriguez Garcia
(UAN & UIS (Colombia))
Generalized SU(2) Proca inflation
(STARS)
Yeinzon Rodriguez Garcia
(UAN & UIS (Colombia))
2:50 PM  3:10 PM
The generalized SU(2) Proca theory is the only modified gravity theory, nowadays, able to accommodate in a natural way a configuration of vector fields which is compatible with the homogeneous and isotropic nature of our Universe. In previous works, we have been able to uncover a selftuning mechanism that drives an eternal slowroll inflationary period for an ample spectrum of initial conditions. We have made a little and justified modification to the action so that the mentioned selftuning mechanism is preserved but now the inflationary period has a graceful exit and is long enough to solve the classical problems of the standard Cosmology. The action is free of tachyonic, ghost, and Laplacian instabilities, and, in addition, provides a nonanomalous speed for the gravity waves. The usual naturalness problem of the primordial inflation in this scenario is, therefore, essentially absent.
3:10 PM
LieBacklund transformations for residual symmetries in General Relativity

Miguel Angel Marquina Carmona
(CINVESTAV IPN)
LieBacklund transformations for residual symmetries in General Relativity
(STARS)
Miguel Angel Marquina Carmona
(CINVESTAV IPN)
3:10 PM  3:30 PM
LieBacklund transformations have been used to extend the criteria proposed by AyónBeato and VelázquezRodríguez for characterizing the residual symmetries of the gravitational ansatz developed according to Liepoint transformations. We found that nonlocal LieBacklund transformations allows us to obtain the more general residual symmetries of the metric. We present the generalized criteria for finding all residual symmetries for any metric ansatz in general relativity.
3:30 PM
Correlation functions of sourced gravitational waves in inflationary scalar vector models. A symmetry based approach

Josue Motoa Manzano
(Universidad del Valle)
Correlation functions of sourced gravitational waves in inflationary scalar vector models. A symmetry based approach
(STARS)
Josue Motoa Manzano
(Universidad del Valle)
3:30 PM  3:50 PM
In this work we use the correspondence between a field theory in de Sitter space in 4dimensions and the dual conformal field theory in an euclidean space in 3dimensions, to compute the form of two and three point correlation functions of scalartensor perturbations. To this end, we use an inflationary model, in which the inflaton field is interacting with a vector field trough the term $f(\phi)\left(F_{\mu \nu}F^{\mu \nu}+\kappa\tilde{F}_{\mu \nu}F^{\mu \nu}\right).$ The first step of this method consist in to solve the equations of motion for the fields in the de Sitter 4D spacetime, then evaluate this solutions in superHubble scales and compute the conformal weight of the projection of this fields in the 3D space. In a second stage, we propose a general form for the correlators, which involve scalar, vector and tensor perturbations and, using the first step result, find its momentum dependence by imposing that those are invariant under dilatations and special conformal transformation (SCT). As a result, we find the form for the different Spectrums of the tensor perturbations and for the a mixed Bispectrum coming from the vacuum and for the vector perturbations. They show to be in agreement with the results in the literature.
3:50 PM
The symmetry energy in neutron stars: constraints from GW170817 and direct Urca cooling

David Edwin Alvarez Castillo
(JINR)
The symmetry energy in neutron stars: constraints from GW170817 and direct Urca cooling
(STARS)
David Edwin Alvarez Castillo
(JINR)
3:50 PM  4:10 PM
In this contribution I will review the state of the art measurements for the symmetry energy from both astrophysical and terrestrial laboratories. In particular the recent detection of gravitational radiation from the GW170817 event shed light on the properties of the neutron star equation of state, thus comprising both the study of the symmetry energy and stellar radius. Furthermore, I shall address the question on the possibility of a universal symmetry energy contribution to the neutron star equation of state under restricted Direct Urca cooling. When these two aspects are combined, powerful predictions for the neutron star equation of state are obtained.
4:10 PM
StueckelbergHorwitzPiron (SHP) classical mechanics with evolving local metric

Martin Land
(Hadassah College)
StueckelbergHorwitzPiron (SHP) classical mechanics with evolving local metric
(STARS)
Martin Land
(Hadassah College)
4:10 PM  4:30 PM
StueckelbergHorwitzPiron (SHP) theory is a framework for posing classical and quantum relativistic physics in canonical form with an external parameter of evolution $\tau$. SHP electrodynamics generalizes Maxwell theory by allowing the fourvector potential to depend on $\tau$ and introducing a scalar gauge potential $a_5(x,\tau)$ associated with this $\tau$dependence. As a result, current conservation, wave equations, and other scalar expressions suggest a formal 5D symmetry that breaks to tensor and scalar representations of O(3,1) in the presence of 4D matter. Following a similar approach, this electrodynamic theory has recently been extended to nonabelian gauge symmetries and to the classical and quantum manybody problem in curved 4D spacetime with local metric $g_{\mu\nu}(x)$, for $\mu,\nu = 0,1,2,3$. In this talk we examine another extension of classical SHP mechanics by allowing the local metric to be $\tau$dependent and introducing new metric components associated with $\tau$ evolution. In order to obtain a reasonable prescription for this generalization, consistent with an extended equivalence principle, the breaking of formal 5D tensor symmetries must be treated in detail. This extension permits us to describe particle motion in geodesic form with respect to a dynamically evolving background metric. As an example, we consider the field produced by a $\tau$dependent mass $M(\tau)$, first as a perturbation in the Newtonian approximation and then for a Schwarzschildlike metric. As expected, the extended Einstein equations imply a nonzero energymomentum tensor, representing the flow of mass energy corresponding to the changing source mass. Moreover, the Hamiltonian (the scalar system mass) is driven by terms proportional to $dM / d\tau$ and is not conserved. In $\tau$equilibrium, this system becomes a generalized Schwarzschild solution for which the extended Ricci tensor and massenergymomentum tensor vanish.
4:30 PM
COFFEE BREAK AND POSTER SESSION
COFFEE BREAK AND POSTER SESSION
4:30 PM  4:50 PM
4:50 PM
On the dynamics of rotationally supported galaxies

Ramzi Suleiman
(Triangle Research & Development Center)
On the dynamics of rotationally supported galaxies
(STARS)
Ramzi Suleiman
(Triangle Research & Development Center)
4:50 PM  5:10 PM
A recent finding, based on empirical data of 153 rotationally supported galaxies, with very diﬀerent morphologies, masses, sizes, and gas fractions, revealed that the baryonic and the dark matter in galaxies are strongly coupled, such that, if the first is known, the second follows and vice versa. Here, we propose a completely theoretical analysis of the dynamics of rotationally supported galaxies, which results in the same conclusion. We find that the relationship between baryonic and dark matter densities at any radius r is governed by the law, ρ(r)_M + ρ(r)_DM = ρ_0, where ρ(r)_M, and ρ(r)_DM are, respectively, the densities of matter and dark matter at radius r, and ρ_0 is the density at the galaxy’s center. Strikingly, we also found that the radius r_s, at which the rotation velocity is equal to half of its maximal value (or alternatively the radius r_c at which the baryonic matter density is equal to half of its density at the galaxy’s center) constitutes a vivid signature of the galaxy, in the sense that it reveals rich information about the galaxy’s dynamics, including the distribution of its matter and dark matter and their total amounts in the galaxy.
Wednesday, May 8, 2019
9:00 AM
A hybrid model for pulsar evolution

Zhi Fu Gao
(Xinjiang Astronomical Observatory, Chinese Academy of Sciences)
A hybrid model for pulsar evolution
(STARS)
Zhi Fu Gao
(Xinjiang Astronomical Observatory, Chinese Academy of Sciences)
9:00 AM  9:20 AM
The combined effects of both the standard magnetic dipole model and the composite neutron superfluid vortex model on the energy loss rate of neutron stars and pulsar spin down are simultaneously taken into account to study the evolution of neutron stars on the PPdot diagram. The evolution path of each neutron star is dictated by a particular mechanism in our hybrid model in different parameter spaces and the valley of each curve is the most possible place for a neutron star to be observed since this is the place which corresponds to the minimum value of the evolution speed (i.e. the time derivative Pdot). In other words, pulsars would distribute around these valleys on the PPdot diagram. The combined model can be fitted very well with observation to yield the interesting results:(1) the suppressed region in the lowerright part of the diagram can be explained by neutrino cyclotron emission from the 1S0 neutron superfluid vortexes in neutron stars. (2) All radio pulsars that were identified with super strong magnetic fields with field strength beyond the critical quantum magnetic field before are now all lying inside the critical magnetic field line in our model. (3) The peak of neutron star magnetic fields (logB) distribution revels a gaussian distribution in our model whereas the statistics of the simple magnetic dipole model results in a distribution with nonsymmetrical peak.
9:20 AM
Efficient cosmicray acceleration at reverse shocks in supernova remnants

Satoru Katsuda
(Saitama University)
Efficient cosmicray acceleration at reverse shocks in supernova remnants
(STARS)
Satoru Katsuda
(Saitama University)
9:20 AM  9:40 AM
When a supernova explodes, a blast wave is generated and propagates into the ambient medium, whereas the deceleration of the ejecta by the ambient medium induces an inwardpropagating shock wave, the socalled reverse shock (RS). If the RSs can efficiently accelerate cosmicrays, then they can be important production sites of heavyelement cosmicrays. We present evidence for efficient cosmicray acceleration at reverse shocks in young Galactic supernova remnants including Cassiopeia A and RCW 86, based on recent Xray observations with Chandra.
9:40 AM
Crustal torsional oscillations inside the deeper pasta structures

Hajime Sotani
(National Astronomical Observatory of Japan)
Crustal torsional oscillations inside the deeper pasta structures
(STARS)
Hajime Sotani
(National Astronomical Observatory of Japan)
9:40 AM  10:00 AM
The quasi periodic oscillations (QPOs) observed in the softgamma repeaters are generally considered as a results of the global oscillations of the neutron stars. In this study, we first take into account the torsional oscillations excited in the tube and bubble phases, which can be excited independently of the oscillations in the phases of spherical and cylindrical nuclei, and successfully identify the observed QPO frequencies with such torsional oscillations. The resultant neutron star models are consistent with the mass formula for lowmass neutron stars and the constraint by the gravitational waves from the merger of the neutron star binary, GW170817.
10:00 AM
Gravitational wave emitted from corecollapse supernovae

Tomoya Takiwaki
(Tomoya)
Gravitational wave emitted from corecollapse supernovae
(STARS)
Tomoya Takiwaki
(Tomoya)
10:00 AM  10:20 AM
Gravitational wave signal from corecollapse supernova is the key to understand the mechanism of corecollapse supernovae. The evolution of the frequency of the signal tells us the property of neutron star and information of the accretion flow near the neutron star. In this study, I will introduce the gravitational waveform based on our recent 3D simulations and discuss what information extracted from the signal.
10:20 AM
Cosmic matter in the laboratory  Investigating neutron star core densities with FAIR

Christian Sturm
(GSI Helmholtzentrum fuer Schwerionenforschung)
Cosmic matter in the laboratory  Investigating neutron star core densities with FAIR
(STARS)
Christian Sturm
(GSI Helmholtzentrum fuer Schwerionenforschung)
10:20 AM  10:40 AM
The Facility for Antiproton and Ion Research, FAIR, is presently being constructed adjacent to the existing accelerator complex of the GSI Helmholtz Centre for Heavy Ion Research at Darmstadt/Germany, expanding the research goals and technical possibilities substantially. The worldwide unique accelerator and experimental facilities of FAIR will open the way for a broad spectrum of unprecedented forefront research supplying a large variety of experiments in hadron, nuclear, atomic and plasma physics as well as biomedical and material science which will be briefly described in this presentation. Emphasis will be put on the investigation of the highest baryon densities accessible in the laboratory by relativistic nucleusnucleus collision at FAIR energies, probing strongly interacting matter under extreme conditions as we expect inside neutron stars.
10:40 AM
COFFEE BREAK AND POSTER SESSION
COFFEE BREAK AND POSTER SESSION
10:40 AM  11:00 AM
11:00 AM
Predictions of the pseudocomplex theory of gravity for EHT observations: Observational tests

Thomas Boller
(MPE Garching)
Predictions of the pseudocomplex theory of gravity for EHT observations: Observational tests
(STARS)
Thomas Boller
(MPE Garching)
11:00 AM  11:30 AM
A modified theory of gravity, avoiding singularities in the standard theory of gravitation, has been developed by Hess \& Greiner, known as the pseudocomplex theory of gravitation. The pcGR theory shows remarkable observational differences with respect to standard GR. The intensity profiles are significantly different between both theories, which is a rare phenomenon in astrophysics. This will allow robust tests of both theories using Event Horizon Telescope (EHT) observations of the Galactic Center. We also predict the time evolution of orbiting matter. In this paper we summarize the observational tests we have developed to date. In case that the EHT data are public, we will discuss their implication on the pcGR theory.
11:30 AM
Comparison of the predictions of the pcGR to the observations of the EHT

Peter Hess
(Universidad Nacional Autónoma de México)
Comparison of the predictions of the pcGR to the observations of the EHT
(STARS)
Peter Hess
(Universidad Nacional Autónoma de México)
11:30 AM  12:00 PM
The observation predictions of the pseudocomplex General Relativity, related to the structure of an accretion disk, are compared to the reported observations of the Event Horizon Telescope.
12:00 PM
CLOSING STARS2019  Peter Hess
CLOSING STARS2019  Peter Hess
12:00 PM  12:30 PM
12:30 PM
LUNCH
LUNCH
12:30 PM  2:30 PM
2:30 PM
FREE
FREE
2:30 PM  8:00 PM
8:00 PM
CELEBRATION DINNER
CELEBRATION DINNER
8:00 PM  10:00 PM
Thursday, May 9, 2019
9:30 AM
TRIP TO NAVITI BEACH CLUB VARADERO HOTEL  BUSES LEAVE AT 09:30
TRIP TO NAVITI BEACH CLUB VARADERO HOTEL  BUSES LEAVE AT 09:30
9:30 AM  1:00 PM
1:00 PM
ARRIVAL
ARRIVAL
1:00 PM  1:30 PM
1:30 PM
LUNCH
LUNCH
1:30 PM  3:00 PM
3:00 PM
REGISTRATION
REGISTRATION
3:00 PM  3:30 PM
3:30 PM
FREE
FREE
3:30 PM  5:00 PM
Friday, May 10, 2019
9:20 AM
Physics and astrophysics with the Pierre Auger Observatory

Rogerio de Almeida
(Universidade Federal Fluminense)
Physics and astrophysics with the Pierre Auger Observatory
(STARS)
Rogerio de Almeida
(Universidade Federal Fluminense)
9:20 AM  9:40 AM
One century after the discovery of cosmic rays, the origin of ultra high energy cosmic rays still remains enigmatic. Taking data since 2004, the Pierre Auger Collaboration has been expanding our knowledge about these cosmic particles with energies much higher than what LHC can achieve. Although some intriguing questions have been answered, some of the mystery still persists. The focus of this presentation is on the most recent results on ultrahigh energy cosmic rays obtained with the Pierre Auger Observatory with emphasis on the anisotropy studies of the arrival directions of the most energetic particles.
9:40 AM
CPT violation due to quantum decoherence tested at DUNE

Félix Napoleón Díaz Desposorio
(Pontificia Universidad Católica del Perú)
CPT violation due to quantum decoherence tested at DUNE
(STARS)
Félix Napoleón Díaz Desposorio
(Pontificia Universidad Católica del Perú)
9:40 AM  10:00 AM
In this work we study the intrinsic CPT violation in the neutrino oscillations phenomena produced by quantum decoherence as subleading effect. In the usual representation, we find that only fifteen elements of the decoherence matrix violate the CPT symmetry intrinsically. We find exact solutions for the CPT asymmetry function in vacuum . We define an observable $\mathcal{R}$ to make predictions of this model for the future LongBaseline experiment, DUNE. We found values of the decoherence parameters with $5 \sigma$ of discrepancy to standard physics which are allowed by the current experimental limits, suggesting hints for new physics by this model in the context of future experiments. arXiv:1811.04982
10:00 AM
Nonlinear electrodynamics for astrophysical plasmas

Marcelo Enrique Rubio
(IATE  CONICET)
Nonlinear electrodynamics for astrophysical plasmas
(SMFNS)
Marcelo Enrique Rubio
(IATE  CONICET)
10:00 AM  10:20 AM
In this work we study the initial value problem of a nonlinear extension of classical Electromagnetism, known as "ForceFree Electrodynamics" (FFE). The FFE equations describe the dynamics of a diluted plasma near the event horizon of a rotating black hole. In these astrophysical regions, magnetic fields dominate the dynamics when compared with the matter that constitutes those plasmas, giving rise to an decoupled description for Electromagnetism. As a starting point, we consider a covariant formulation of the FFE theory in terms of two scalar potentials, known as "Euler potentials", which allow a very elegant and precise geometric interpretation of it. The ease of formulating FFE in terms of two potentials lies in the fact that, being the only dynamical variables, it provides an optimal scenario for its numerical implementation. In this work we show that this formulation is weakly hyperbolic, which means that the system does not have a well posed initial value problem in the usual sense. In this way, it is not possible to guarantee uniqueness or continuity during the dynamic evolution, which implies that this formulation is not convenient for numerical simulations.
10:20 AM
Modeling anisotropic magnetized compact stars with $\gamma$ metric: the white dwarfs picture

Diana Alvear Terrero
(ICIMAF)
Modeling anisotropic magnetized compact stars with $\gamma$ metric: the white dwarfs picture
(SMFNS)
Diana Alvear Terrero
(ICIMAF)
10:20 AM  10:40 AM
Magnetic fields introduce an anisotropy in compact stars’ equations of state by splitting the pressure into two components, one parallel and the other perpendicular to the magnetic field. This suggests the necessity of using structure equations accounting for the axial symmetry of the magnetized system. We consider an axially symmetric metric in spherical coordinates, the $\gamma$metric, and construct a system of equations to describe the structure of spheroidal compact objects. In this way, we connect the geometrical parameter $\gamma$ linked to the spheroid’s radii, with the source of the anisotropy. So, the model relates the shape of the compact object to the physics that determines the properties of the composing matter. To illustrate how our structure equations work, we present magnetized white dwarfs structure and discuss the stability of the solutions. The results are obtained for magnetic field values of $10^{12}$G, $10^{13}$G and $10^{14}$G, in all cases with and without the Maxwell contribution to the pressures and energy density. This choice allows to have two sets of EoS, one featuring $\gamma>1$ and other with $\gamma<1$ .
10:40 AM
COFFEE BREAK AND POSTER SESSION
COFFEE BREAK AND POSTER SESSION
10:40 AM  11:00 AM
11:00 AM
Magnetic field effects on BoseEinstein condensate stars

Gretel Quintero Angulo
(Facultad de Física, Universidad de La Habana)
Magnetic field effects on BoseEinstein condensate stars
(SMFNS)
Gretel Quintero Angulo
(Facultad de Física, Universidad de La Habana)
11:00 AM  11:20 AM
We study magnetic field effects on the Equations of State (EoS) and the structure (massradius relation) of BoseEinstein Condensate (BEC) stars, i.e. a compact object composed by a gas of interacting spin one bosons formed up by the pairing of two neutrons. To include magnetic field in the star description we suppose that particlefield and particleparticle interactions are independent, and consider two situations, one where the magnetic field is constant, and another where it is produced by the bosons. Magnetic field presence splits the pressure of the boson gas in two components, one parallel and the other perpendicular to field direction. At low densities and/or strong fields the smaller pressure might be negative, making the boson system unstable. This imposes a lower limit to the central mass density of the star in a way that, the stronger is the magnetic field, the denser has to be star to support its mass against collapse. Since the anisotropy in the pressures implies that the resulting star is not spherical, to compute the massradius relation we use the recently found γstructure equations that describe axially symmetric objects provided they are spheroidal. The obtained BEC stars are, in general, less massive and smaller than in the nonmagnetic case, being magnetic field effects more relevant for low densities. When the magnetic field is produced by the bosons, the inner profiles of the fields are determined self consistently as a function of the star inner radii, its values being in the orders expected for compact stars.
11:20 AM
Thermodynamic properties of a magnetized neutral vector boson gas at finite temperature

Lismary de la Caridad Suárez González
(Instituto de Cibernética Matemática y Física,Habana, Cuba)
Thermodynamic properties of a magnetized neutral vector boson gas at finite temperature
(SMFNS)
Lismary de la Caridad Suárez González
(Instituto de Cibernética Matemática y Física,Habana, Cuba)
11:20 AM  11:40 AM
We study the thermodynamic properties of a neutral vector boson gas in presence of a constant magnetic field at finite temperature. The study has been done considering relativistic and nonrelativistic bosons. In general, one of the most outstanding properties of magnetized bosonic systems is the occurrence of BoseEinstein condensation (BEC) and BoseEinstein ferromagnetism: in the condensed state, the gas shows a spontaneous magnetization. The main purpose of this work is to study the effect of temperature on the equations of state for that matter that allows more accurate descriptions of compact objects, specifically of neutron stars, which might contain spin1 bosons formed up by two paired neutrons. As a limit case we study the structure of stars fully composed by matter in this form.
11:40 AM
Modeling anisotropic magnetized strange quark stars

Samantha López
(ICIMAF)
Modeling anisotropic magnetized strange quark stars
(SMFNS)
Samantha López
(ICIMAF)
11:40 AM  12:00 PM
When studying the structure of magnetized compact objects, the anisotropy in their equations of state (EoS), due to the magnetic field, must be taken into account. This anisotropy consists in the splitting of the pressure in two components, one parallel and the other perpendicular to the magnetic field. In this work, we compare the size and shape of magnetized strange quark stars using three different sets of structure equations. First, we solve the standard isotropic TolmanOppenheimerVolkoff equations for the parallel and perpendicular pressures independently. Then, we obtain the massradii curves of the magnetized strange quark stars using axially symmetric metrics in cylindrical and spherical coordinates, this last one called the gammametric. The differences between the results obtained in each case are discussed.
12:00 PM
LUNCH
LUNCH
12:00 PM  2:00 PM
2:00 PM
The magnetized photon time delay and Faraday rotation

Adrian William Romero Jorge
The magnetized photon time delay and Faraday rotation
(SMFNS)
Adrian William Romero Jorge
2:00 PM  2:20 PM
We study the propagation of photon in magnetized vacuum and medium, taking into account radiative corrections. We describe both time delay and Faraday rotation, with the aim of applying the results to astrophysical context.
2:20 PM
The mathematical description of the influence of the expansion of the Universe on the metric of a black hole

Adrian LinaresRodríguez
(Universidad Central "Marta Abreu" de Las Villas, Santa Clara ci)
The mathematical description of the influence of the expansion of the Universe on the metric of a black hole
(SMFNS)
Adrian LinaresRodríguez
(Universidad Central "Marta Abreu" de Las Villas, Santa Clara ci)
2:20 PM  2:40 PM
The existence of black holes has its analytical argumentation in Einstein's field equations. The first solution of general relativity that would characterize a black hole was found by Schwarzschild in 1916. Since then, these cosmic objects are being studied and investigated in their various variants: Scwartzshild, Kerr, ReissnerNordström, KerrNewman, and others. The nohair theorem states that a black hole has only three independent properties: mass, charge and angular momentum and is characterized by producing intense gravitational fields. On the other hand, the existence in the Universe of a dark material component of the repulsive type against the attractive action of gravitation can be represented by the quintessence. The effect of the quintessence surrounding the black hole is then introduced. Ordinarily, an additional element within the stressenergymoment tensor of the Einstein field equations is introduced. The mathematical description of this problem is complicated, in general. In this investigation, we have chosen to use a variant in which the effect of the quintessence is introduced as a perturbative action in the metric of the ordinary black hole introducing the timedependent scale factor. The Einstein field equations are obtained using the perturbed metric and the results obtained correspond to those obtained by the ordinary way.
2:40 PM
Extending observations to distances larger than 10 kpc should resolve the anomaly of a galaxy lacking dark matter

Ramzi Suleiman
(Triangle Research & Development Center)
Extending observations to distances larger than 10 kpc should resolve the anomaly of a galaxy lacking dark matter
(SMFNS)
Ramzi Suleiman
(Triangle Research & Development Center)
2:40 PM  3:00 PM
We investigated the claim that galaxy NGC 1052DF2 lacks dark matter. For this purpose, we constructed a novel, theorybased computer simulation of the dynamical interaction of matter and dark matter in a prototypical ellipsoid galaxy and utilized it to predict the distributions of dark matter in a galaxy as a function of the galaxy’s core radius and maximal rotation velocity. We ran the simulation using the parameters of NGC 1052DF2 as well as the parameters of six other UDGs from the Coma cluster and seven dSph galaxies from the local group. For each galaxy, the simulation was run in steps of 2 kpc up to 100 kpc from the galaxy center. Inspection of the distributions of matter and dark matter generated by the simulated, as a function from distance r, reveals the following: (1) Consistent with the ΛCDM paradigm, all the tested galaxies, including galaxy NGC 1051DF2, are predicted to be darkmatterdominated. (2) The reported lack of dark matter within r ≤ 10 kpc is supported by the simulation results. However, this result is an aftermath of conducting a “shortsighted” observation for only r < 10 kpc. (3) Consistent with ΛCDM models, the bulk of dark matter at galactic scales resides at the galaxies’ halos. (5) The core radius of a galaxy is predictor of the proportions of matter and dark matter in the galaxy.
3:00 PM
COFFEE BREAK AND POSTER SESSION
COFFEE BREAK AND POSTER SESSION
3:00 PM  3:30 PM
3:30 PM
Discussion Session
Discussion Session
3:30 PM  5:00 PM
Saturday, May 11, 2019
9:20 AM
Homogeneity of the universe emerging from the Equivalence Principle and Poisson equation: A comparison between Newtonian and MONDian cosmology

Eduardo Guendelman
(Ben Gurion University)
Homogeneity of the universe emerging from the Equivalence Principle and Poisson equation: A comparison between Newtonian and MONDian cosmology
(SMFNS)
Eduardo Guendelman
(Ben Gurion University)
9:20 AM  9:40 AM
A correspondence between the Equivalence principle and the homogeneity of the universe is discussed. We show that under the Newtonian gravity, translation of comoving coordinates in a uniformly expanding universe defines a new accelerated frame. A consistency condition for the invariance of this transformation yields the second Friedman equation. All these symmetries are lost when we modify Newton’s second law and/ or the Poisson equation. For example by replacing Newton’s second law with nonlinear function of the acceleration, as Modified Newtonian Dynamics (MOND) suggested, the concept of relative acceleration is lost. As a consequence the homogeneity of the universe breaks. Therefore MOND which changes Newton’s second law or a QUAdratic Lagrangian (AQUAL) which changes the Poisson equation are not complete theories and they should be amended to preserve the cosmological principle. Only locally could MOND be used as a toy model, but not as a global theory which should describe a universe in large scales.
9:40 AM
A study in progres about a dynamical gravastar solution

Duvier Fontanella
(ICIMAF)
A study in progres about a dynamical gravastar solution
(SMFNS)
Duvier Fontanella
(ICIMAF)
9:40 AM  10:00 AM
We present the state of research devoted to investigate the consequences of a formerly proposed regular solution at the origin for the EinsteinKleinGordon equations. We implement a match with the Schwarzschild solutions with a zero scalar field outside a spherical region. The configuration of fields are used as a first step in an iterative process to calculate the vacuum expectation value of the energymomentum tensor, aiming at further solving the Einstein semiclassical equation. The result shows the quantum corrections to the previous solution. It is expected that further steps in the iterative process will regulate the previous solutions, by leading to the convergence of the iterative solution. The first step in the iteration solution and an explicit dependence of the expectation value of the energymomentum tensor with the metric are found.
10:00 AM
Perturbations to planetary biospheres due to high energy muons from cosmic ray bursts originated in neutron star mergers

Rolando Cardenas
(Universidad Central ''Marta Abreu'' de Las Villas)
Perturbations to planetary biospheres due to high energy muons from cosmic ray bursts originated in neutron star mergers
(SMFNS)
Rolando Cardenas
(Universidad Central ''Marta Abreu'' de Las Villas)
10:00 AM  10:20 AM
In this work a mathematical model for aquatic photosynthesis, modified by some of us to include particulate ionizing radiation, is used to assess the perturbations that muons coming from neutron star mergers could make to this biological process. It is then shown that neutron star mergers not too far from inhabited rocky planets have the potential to considerably deplete their aquatic photosynthesis. Some remarks concerning the affectation on other types of subsurface life are also done, and by extension some considerations on habitability of the Milky Way are presented.
10:20 AM
Z production in pPb and PbPb collisions at 5.2 TeV

Dario Ramirez Zaldivar
(InSTEC, Havana University)
Z production in pPb and PbPb collisions at 5.2 TeV
(STARS)
Dario Ramirez Zaldivar
(InSTEC, Havana University)
10:20 AM  10:40 AM
There is a growing interest in the exam and analysis of results in the ALICE, ATLAS and CMS detectors in asymmetric systems (pPb) due to the possibilities of establishing some references for PbPb collisions and to gain insight into the behavior of the medium itself. The analysis of data in both cases can allow the understanding of the PDFs under different regimes. The study of the initial state in protonlead collision at 5.02 TeV using DrellYan process was chosen because the inclusive lepton production is a clean process independent of the color degree freedoms. For the study, it was considered an extension of the Glauber model to express the crosssection. Under this approach, we can examine the initial vertex of the hard process described by sigma_pp and apply the usual calculation through the factorization theorem. In particular, we focused on the analysis of the pT distribution and compared the role of different factorization schema in the behavior of the distribution at low pT.
10:40 AM
COFFEE BREAK AND POSTER SESSION
COFFEE BREAK AND POSTER SESSION
10:40 AM  11:00 AM
11:00 AM
Towards the measurement of the anisotropic pressures effects in magnetized quantum vacuum

Hugo Celso Peréz Rojas
(ICIMAF)
Towards the measurement of the anisotropic pressures effects in magnetized quantum vacuum
(SMFNS)
Hugo Celso Peréz Rojas
(ICIMAF)
11:00 AM  11:20 AM
Starting from the fact that vacuum pressure orthogonal to a constant magnetic field is negative, whereas along the field is positive, we estimate the shift of frequency for radiation moving in these directions to first order in α at small fields as compared to the Schwinger critical field Bc, and suggest ideas for its experimental test. For fields of order of or greater than 2Bc we briefly discuss the arising of an imaginary part on the vacuum energy, meaning its instability at such fields. We propose an heuristic model of bosonic electronpositron bound state leading to a ferromagnetic quantum phase transition of vacuum at critical fields 2Bc.
11:20 AM
WALTER GREINER PRIZE / CLOSING SMFNS2019
WALTER GREINER PRIZE / CLOSING SMFNS2019
11:20 AM  12:00 PM
12:00 PM
LUNCH
LUNCH
12:00 PM  2:00 PM
2:00 PM
Discussion Session
Discussion Session
2:00 PM  3:30 PM
3:30 PM
COFFEE BREAK
COFFEE BREAK
3:30 PM  4:00 PM
4:00 PM
FREE
FREE
4:00 PM  8:00 PM
8:00 PM
CELEBRATION DINNER
CELEBRATION DINNER
8:00 PM  10:00 PM
Sunday, May 12, 2019
9:00 AM
FREE
FREE
9:00 AM  12:00 PM
12:00 PM
LUNCH
LUNCH
12:00 PM  2:30 PM
2:30 PM
RETURN TO HAVANA  BUSES LEAVE NAVITI BEACH CLUB VARADERO HOTEL AT 14:30
RETURN TO HAVANA  BUSES LEAVE NAVITI BEACH CLUB VARADERO HOTEL AT 14:30
2:30 PM  4:30 PM