Exploring Binary Neutron Star mergers: population synthesis and gamma-ray burst afterglows

by Dr. Clement Pellouin

TAU

at Astrophysics and Cosmology Seminar

Wed, 11 Jun 2025, 11:10
Sacta-Rashi Building for Physics (54), room 207

Abstract

In 2017, the multi-messenger astronomy era with gravitational waves was opened with the detection of a binary neutron star merger - GW 170817 - and its electromagnetic counterparts: a short gamma-ray burst and its multi-wavelength afterglow. In this presentation, I will show how we can leverage binary neutron star (BNS) merger observations following two axes:
Through statistical studies using population synthesis. I will show that the population of merging BNSs teaches us about the evolutionary tracks of their progenitor stars - and how this may evolve with redshift;
Via the properties of their multi-wavelength afterglows. I will present a model that accounts for the lateral structure of GRB jets and computes their emissivity, accounting for synchrotron and synchrotron self-Compton in Thompson and Klein-Nishina regimes. I will show predictions for the expected emission at very high energies (~ 1 TeV).

Created on 08-06-2025 by Zitrin, Adi (zitrin)
Updaded on 08-06-2025 by Zitrin, Adi (zitrin)