Prompt-phase of GRBs: Implications from internal shocks

by Dr. Minhajur Rahaman

The Open University of Israel
at Astrophysics and Cosmology Seminar

Wed, 22 Jan 2025, 11:10
Sacta-Rashi Building for Physics (54), room 207

Abstract

Internal shocks are one of the leading dissipation mechanisms for powering the prompt phase of Gamma-ray bursts (GRBs). The basic paradigm is that a central engine produces a variable outflow wherein the faster trailing material collides with the slower leading material at a distance from the engine. Each collision produces a pair of shock fronts, a reverse and a forward shock front propagating in the faster and the slower material respectively. In general, the physical conditions in both the shocked regions are very different. In my talk, I will show how starting from a few basic central engine parameters, a self-consistent hydrodynamic solution of both shocked regions provides ingredients for understanding the spectra and the light pulses of prompt-GRBs. I will also show how internal shocks in structured jets can give a unifying theme for classical GRBs (CGRBs), X-ray riches (XRRs), and X-ray flashes (XRFs).

Created on 19-01-2025 by Zitrin, Adi (zitrin)
Updaded on 19-01-2025 by Zitrin, Adi (zitrin)