Variability in GRBs - A Clue
Astrophysics
2016-08-30 v1
Abstract
We show that external shocks cannot produce a variable GRB, unless they are produced by an extremely narrow jets (angular opening of < ~10^{-4}) or if only a small fraction of the shell emits the radiation and the process is very inefficient. Internal shocks can produce the observed complex temporal structure provided that the source itself is variable. In this case, the observed temporal structure reflects the activity of the ``inner engine'' that drives the bursts. This sets direct constraints on it.
Keywords
Cite
@article{arxiv.astro-ph/9701002,
title = {Variability in GRBs - A Clue},
author = {Re'em Sari and Tsvi Piran},
journal= {arXiv preprint arXiv:astro-ph/9701002},
year = {2016}
}
Comments
15 page latex file with 5 PS figure. Complete uuencoded compressed PS file is available at ftp://shemesh.fiz.huji.ac.il or at http://shemesh.fiz.huji.ac.il/papers/SaP_aclue.uu