Conveners
Session 6
- Lorenzo Cabona (INAF - OABrera)
- Davide Ricci (Istituto Nazionale di Astrofisica (INAF))
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Hao Wang (Department of Physics and Astronomy, Purdue University)28/09/2022, 15:00Oral contribution
The electromagnetic radiation that followed the neutron star merger event GW170817 revealed that gamma-ray burst afterglows from jets misaligned with our line of sight exhibit a light curve with slowly rising flux. The slope of the rising light curve depends sensitively on the angle of the observer with respect to the jet axis, which is likely to be perpendicular to the merger plane of the...
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Agnese Costa (INAF - OA Brera, Università degli Studi dell'Insubria)28/09/2022, 15:20Oral contribution
AGN jets are the most powerful persistent emitters in the Universe, but the mechanisms through which they dissipate part of their energy flux and convey it to relativistic particles are still elusive. Despite advances on the numerical and theoretical side, the identification of the processes at work is made difficult by the huge range of spatial and temporal scales involved and by the strong...
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Jaikhomba Singha (Indian Institute of Technology Roorkee)28/09/2022, 15:40Oral contribution
Pulsars are rotating neutron stars emitting a beam of radio light from their magnetic axis. As the pulsar signal passes through the interstellar medium (ISM), it gets smeared due to the variation of the group velocity of the radiation with wavelength caused by the electrons in the line of sight. This smearing can be due to dispersion by the integrated column density of electrons or multipath...
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Angelo Pidatella (Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud)28/09/2022, 16:00Oral contribution
Joint observations of gravitational-wave (GW) event to compact binary objects mergers, and of their electromagnetic counterpart, known as kilonova (KN) lead to a new avenue in the multi-messenger astronomy era to constrain the astrophysical origin of the r-process elements and the equation of state of dense nuclear matter [1]. Coalescence of double neutron star releases n-rich ejecta which...
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Paweł Szewczyk28/09/2022, 16:50Oral contribution
Highly differentially rotatig neutron stars can be produced in core-collapse supernova explosions. These objects may be significantly more massive than rigidly rotating neutron staers. Even for a modest degree of differential rotation we find equilibrium solutions with masses up to 4 times larger then the TOV limit. While the rotation profile evolves into uniform rotation on secular...
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Anna Puecher28/09/2022, 17:10Oral contribution
Gravitational waves provide us with an extraordinary tool to study the matter of neutron stars. In particular, the postmerger signal will reveal a lot of information about matter at such high densities. Although current detectors are mainly sensitive to the signal emitted by binary neutron stars during the inspiral and merger phase, the detectors’ improvements planned for the next observing...
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Luca Caloni (University of Ferrara)28/09/2022, 17:30Oral contribution
Cosmological observations represent a powerful probe to test the presence of new light species beyond the Standard Model (SM) of particle physics. In this talk I will focus on thermal axion-like particles (which I will simply refer to as axions), that can arise from various extensions of the SM and include, as a special case, the QCD axion. Thermal axions can be produced in the early Universe...
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Viviana Cuozzo28/09/2022, 17:50Oral contribution
We present an analytical modelling of the cross-correlation between the total (linear and nonlinear) ISW/Rees- Sciama effect and the galaxy distribution, in the presence of massive neutrinos. The modelling has been compared against sky-maps of CMB and galaxies extracted from the “Dark Energy and Massive Neutrino Universe” (DEMNUni) N-body simulations. We found a significant difference, in the...
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Prof. Chan-Gyung Park (Division of Science Education, Jeonbuk National University)28/09/2022, 17:55Oral contribution
The cosmological principle that the universe is homogeneous and isotropic at large scales is a fundamental assumption of modern cosmology. Recent observations of the galaxy redshift survey provide relevant data to confront the cosmic homogeneity with observation. Several previous studies claim that the homogeneity scale is reached at a radius around 70 Mpc/h. Here we present a homogeneity test...
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