Conveners
D Cosmology, Astrophysics, Gravity, Mathematical Physics
- Egor Podlesnyi
D Cosmology, Astrophysics, Gravity, Mathematical Physics
- Claudia Lazzaro (Università degli Studi di Padova)
D Cosmology, Astrophysics, Gravity, Mathematical Physics
- Mark Dayvon Goodsell (Univ. P. et Marie Curie Paris VI (FR))
D Cosmology, Astrophysics, Gravity, Mathematical Physics
- Sabir Ramazanov (CEICO, Institute of Physics (Prague))
D Cosmology, Astrophysics, Gravity, Mathematical Physics
- There are no conveners in this block
D Cosmology, Astrophysics, Gravity, Mathematical Physics
- There are no conveners in this block
-
Dr Lorenzo Amati (INAF - OAS Bologna)25/08/2021, 08:30Talk
Gamma-Ray Bursts constitute one of the most fascinating and relevant phenomena in modern science, with strong implications for several fields of astrophysics, cosmology and fundamental physics. In this review, I will focus on the perspective key-role of GRBs for cosmology and multi-messenger astrophysics. Indeed, the huge luminosity, the redshift distribution extending at least up to z$\sim$10...
Go to contribution page -
Dr Claudia Lazzaro (Università degli Studi di Padova)25/08/2021, 09:00Talk
Third Observation (O3) run of Advanced LIGO and Advanced Virgo started in April 2019 and ended in March 2020; reaching sensitivities significantly better than those in the previous observing run. This talk will overview the published science results achieved during the O3 run, focusing on the catalog of the gravitational waves signals due to compact binary coalescences (GWTC-2) and on the...
Go to contribution page -
Dr Francesco Sgaramella (INFN - National Institute for Nuclear Physics)25/08/2021, 11:00Talk
The high precision X-ray spectroscopy of exotic atoms, in particular of kaonic atoms, offers the unique opportunity to investigate the strong interaction (QCD) in the low-energy regime, by allowing to directly access the antikaon-nucleus interaction at threshold. In order to do this, a new dedicated technology of Silicon Drift Detectors (SDDs) has been developed by the SIDDHARTA-2...
Go to contribution page -
Sabir Ramazanov (CEICO, Institute of Physics (Prague))25/08/2021, 11:30Talk
I will discuss a novel scenario of Dark Matter production naturally connected with generation of gravitational waves. Dark Matter is modelled as a real scalar, which interacts with the hot primordial plasma through a portal coupling to another scalar field. For a particular sign of the coupling, this system exhibits an inverse second order phase transition. The latter leads to an abundant Dark...
Go to contribution page -
Kaan Ozbozduman (Istanbul Bilgi University (TR))25/08/2021, 12:00Talk
CERN Axion Solar Telescope (CAST), an helioscope since 20 years searching for solar axion, has recently evolved into an haloscope exploring the dark matter axion using resonant microwave cavities. CAST-CAPP is a subdetector mounted in the bore of CAST magnet, consisting of 4 individual cavities that can be phase-matched. Phase-matching is a novel technique in the axion community that help...
Go to contribution page -
Ilias Cholis (Fermi National Accelerator Laboratory)25/08/2021, 12:30Talk
Over the last years, satellite experiments as the Alpha Magnetic Spectrometer on board the International Space Station measure antimatter cosmic ray fluxes, including antiprotons and recently antimatter nuclei. These measurements provide a novel probe to search for new physics including annihilations of dark matter in the Milky Way. I will present an excess of cosmic-ray antiprotons at the GeV...
Go to contribution page -
Aritra Das25/08/2021, 13:00Talk
We examine the effect of anisotropic photon polarisation tensor in the longitudinal electrical conductivity. We consider strongly quantizing domain of neutron star crust for significant thermodynamic contribution for the calculation of transport coefficient. We solve Boltzmann equation in presence of magnetic field to obtain dissipative component of the conductivity tensor. Electrical...
Go to contribution page -
Andrea Parenti (GSSI and INFN-INGS)25/08/2021, 17:00Talk
The DArk Matter Particle Explorer (DAMPE) is a particle detector hosted on board a satellite orbiting around the Earth since December 2015. The space mission has been promoted by the Chinese Academy of Science and results from an international effort also including italian and swiss institutions. The scientific goals include: indirect detection of Dark Matter signatures in cosmic lepton...
Go to contribution page -
Konstantinos Kritos (National Technical University of Athens)25/08/2021, 17:30Talk
Over the past years we have transitioned into a new era of astronomical observations, that of the detection of gravitational waves originating from the coalescence of binary black holes. However, the origin of the detected events remains enigmatic until today. Interesting are the scenarios which probe their dynamical assembly inside of dense stellar systems of astrophysical importance like the...
Go to contribution page -
Dimitrios Kyratzis (Gran Sasso Science Institute (GSSI) & INFN-LNGS)25/08/2021, 17:30Talk
The High Energy cosmic Radiation Detector (HERD) is one of the prominent space-borne instruments to be installed on board the Chinese Space Station (CSS) in 2027 and is the result of a collaboration among chinese and european institutions. Primary scientific goals of HERD include: precise measurements of the cosmic ray (CR) energy spectra and mass composition at energies up to few PeV,...
Go to contribution page -
Antonia Di Crescenzo (Universita e sezione INFN di Napoli (IT))25/08/2021, 18:00Talk
In spite of the extensive search for the detection of the dark matter (DM), experiments have so far yielded null results: they are probing lower and lower cross-section values and are touching the so-called neutrino floor. A way to possibly overcome the limitation of the neutrino floor is a directional sensitive approach: one of the most promising techniques for directional detection is...
Go to contribution page -
Prof. Stanislav Vilchinskii (Taras Shevchenko National University of Kyiv (UA))25/08/2021, 18:00Talk
One of the big problems of modern cosmology is to explain the origin of cosmic magnetic fields (MF). Observations show that galaxies have MF with a component coherent over a large fraction of the galaxy with strengths of microGauss order. These MF are supposed to be the result of amplification of initial weak seed MF of unknown nature. Moreover, analysis of the gamma-ray observations from...
Go to contribution page -
Guido D'Amico (Universita degli Studi di Parma (IT))25/08/2021, 18:30Talk
We consider a short rollercoaster cosmology based on two stages of monodromy inflation separated by a stage of matter domination, generated after the early inflaton falls out of slow roll. If the first stage is controlled by a flat potential, $V \sim \phi^p$ with $p<1$ and lasts $\mathcal{N} \sim 30−40$ efolds, the scalar and tensor perturbations at the largest scales will fit the CMB...
Go to contribution page -
Lee McCuller (Massachusetts Institute of Technology)26/08/2021, 08:30Talk
The LIGO and Virgo observatories are delivering an unprecedented view of the populations and properties of black holes and neutron stars by observing the universe through gravitational waves. Measuring gravitational waves requires incredible physics to detect incredible astrophysics. This talk will detail the characteristics of LIGO's long baseline optical interferometers, the upgrades planned...
Go to contribution page -
Georgy Burde (Ben-Gurion University of the Negev)26/08/2021, 09:00Talk
Cosmological models and the processes accompanying the cosmic rays propagation on cosmological scales are considered on the basis of particle dynamics, electrodynamics and general relativity (GR) developed from the basic concepts of the 'relativity with a preferred frame'. The 'relativity with a preferred frame', designed to reconcile the relativity principle with the existence of the...
Go to contribution page -
Geraint Pratten (University of Birmingham)26/08/2021, 09:30Talk
With an ever growing number of observed compact binary coalescences, LIGO and Virgo are enabling ever more precise tests of the fundamental nature of spacetime. Our ability to test general relativity in the strong field regime is driven by the signal-to-noise ratio of the individual observed binaries as well as the heterogeneity of the underlying astrophysical population of binary black holes....
Go to contribution page -
Dmitry Gorbunov (Russian Academy of Sciences (RU))26/08/2021, 10:00Talk
-
Dr Alexander Yakimenko (Taras Shevchenko National University of Kyiv)26/08/2021, 17:00Talk
The nature of dark matter (DM) is one of the most fascinating unresolved challenges of modern physics. One of the perspective hypotheses suggests that DM consists of ultralight bosonic particles in the state of Bose-Einstein condensate (BEC). The superfluid nature of BEC must dramatically affect the properties of DM including quantization of the angular momentum. Angular momentum quantum in...
Go to contribution page -
Anton Rudakovskyi26/08/2021, 17:30Talk
The number density of small dark matter (DM) halos hosting faint high-redshift galaxies is sensitive to the DM free-streaming properties. However, constraining these DM properties is complicated by degeneracies with the uncertain baryonic physics governing star formation.
Go to contribution page
We use a flexible astrophysical model and a Bayesian inference framework to analyse ultra-violet (UV) luminosity functions... -
Vadym Voitsekhovskyi (Astronomical Observatory of Kyiv National University)26/08/2021, 18:00Talk
The search for sources of ultra high energy cosmic rays (UHECR) remains one of the main unsolved problems in modern astrophysics. Galactic magnetars are promising candidates for the UHECR accelerators due to their ability to generate relativistic plasma flows and shock waves during magnetar giant flares. Such energetic processes in plasma also occurs during a Supernova ejecta energisation...
Go to contribution page -
Mr Egor Podlesnyi (Lomonosov Moscow State University)26/08/2021, 18:30Talk
Blazars – active galactic nuclei (AGN) with their relativistic jets pointing towards the observer – dominate the extragalactic high-energy (E > 100 MeV) gamma-ray sky. It is believed that gamma rays in AGN are mostly produced in the so-called “blobs” – relativistic clouds of magnetized plasma propagating along the AGN jets.
Flat-spectrum radio quasars (FSRQs) are powerful blazars believed...
Go to contribution page