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Gamma Ray Bursts and Their Afterglows

Sari, Re'em (2006) Gamma Ray Bursts and Their Afterglows. In: RELATIVISTIC JETS: The Common Physics of AGN, Microquasars, and Gamma-Ray Bursts. AIP Conference Proceedings. No.856. American Institute of Physics , Melville, NY, pp. 33-56. ISBN 978-0-7354-0353-6.

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Gamma-Ray Bursts are extreme astrophysical events, which emit the bulk of their energy as photons in the 0.1 – 1.0 MeV range, and whose durations span milliseconds to tens of minutes. They are formed in extreme relativistic outflows with Lorentz factors of hundreds, and reside at cosmological distances. They are followed by X-ray, optical and radio afterglows which can be observed for over a year after the event. Observations of afterglows showed that the emission is from jets, and when corrected for this geometry the energies of GRBs appear to cluster around 5 × 10^50 erg — very comparable to that of supernovae. Evidence in the last several years shows that a significant fraction of long GRBs are related to a peculiar type of supernova explosions. These supernovae most likely mark the birth events of stellar mass black holes as the final products of the evolution of very massive stars. Short bursts are still somewhat mysterious, but it is known that some of them are produced by an old population of stars. Neutron star merger is a leading candidate as the progenitor of short GRBs.

Item Type:Book Section
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Sari, Re'em0000-0002-1084-3656
Additional Information:© 2006 American Institute of Physics.
Subject Keywords:Gamma-Ray Bursts, Afterglow, Relativistic Jets
Series Name:AIP Conference Proceedings
Issue or Number:856
Record Number:CaltechAUTHORS:SARaipcp06
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6299
Deposited By: Archive Administrator
Deposited On:01 Dec 2006
Last Modified:01 Jun 2023 22:58

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