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
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...
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...
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...
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...
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...
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...
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...
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...
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,...
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...
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...
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...
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...
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...
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....
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...
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...
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...
