Gamma-Ray Burst Afterglows with Energy Injection: Homogeneous Versus Wind External Media
Abstract
Assuming an adiabatic evolution of a gamma-ray burst (GRB) fireball interacting with an external medium, we calculate the hydrodynamics of the fireball with energy injection from a strongly magnetic millisecond pulsar through magnetic dipole radiation, and obtain the light curve of the optical afterglow from the fireball by synchrotron radiation. Results are given both for a homogeneous external medium and for a wind ejected by GRB progenitor. Our calculations are also available in both ultra-relativistic and non-relativistic phases. Furthermore, the observed R-band light curve of GRB{000301C} can be well fitted in our model, which might provide a probe of the properties of GRB progenitors.
Keywords
Cite
@article{arxiv.astro-ph/0103284,
title = {Gamma-Ray Burst Afterglows with Energy Injection: Homogeneous Versus Wind External Media},
author = {W. Wang and Z G Dai},
journal= {arXiv preprint arXiv:astro-ph/0103284},
year = {2009}
}
Comments
revised version for publication in Chin. Phys. Lett