Viewing angle and environment effects in gamma-ray bursts: sources of afterglow diversity

P. Meszaros, M. J. Rees, R. A.M.J. Wljers

Research output: Contribution to journalArticlepeer-review

258 Scopus citations

Abstract

We discuss the afterglows from the evolution of both spherical and anisotropic fireballs decelerating in an inhomogeneous external medium. We consider both the radiative and adiabatic evolution regimes and analyze the physical conditions under which these regimes can be used. Afterglows may be expected to differ widely among themselves, depending on the angular anisotropy of the fireball and the properties of the environment. They may be entirely absent or may be detected without a corresponding y-ray event. A tabulation of different representative light curves is presented, covering a wide range of behaviors that resemble what is currently observed in the y-ray bursts (GRBs) GRB 970228, GRB 970508, and other objects.

Original languageEnglish (US)
Pages (from-to)301-308
Number of pages8
JournalAstrophysical Journal
Volume499
Issue number1 PART I
DOIs
StatePublished - 1998

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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