Free Access
Issue
Astron. Astrophys. Suppl. Ser.
Volume 138, Number 3, September 1999
Gamma-Ray Bursts in the Afterglow Era Contents Rome, November 3-6, 1998
Page(s) 533 - 536
DOI https://doi.org/10.1051/aas:1999341
Published online 15 September 1999
DOI: 10.1051/aas:1999341



Astron. Astrophys. Suppl. Ser. 138, 533-536

Gamma-ray burst afterglows and their implications

P. Mészáros 

Department of Astronomy & Astrophysics, Pennsylvania State University, University Park, PA 16802, U.S.A.
e-mail: nnp@astro.psu.edu

Received December 29, 1998; accepted March 10; 1999

Abstract:

The discovery of X-ray, optical and radio afterglows of GRBs provides an important tool for understanding these sources. Most current models envisage GRB as arising in a cataclysmic stellar event leading to a relativistically expanding fireball, where particle acceleration at shocks lead to nonthermal radiation. The predictions of this scenario are in substantial agreement with the bulk of the observations. In addition, the data show a diversity of finer structure behavior, which is providing constraints for more detailed models. Current issues of interest are the implications of the beaming for the energetics, the afterglow time structure, dependence on progenitor system, and the role of the environment.

Key words: gamma-ray bursts -- shocks waves

Copyright The European Southern Observatory (ESO)

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