The Edge of a Gamma Ray Burst Afterglow

Details The Edge of a Gamma Ray Burst Afterglow The Edge of a Gamma Ray Burst Afterglow

1998-06-12

arxiv.org/abs/astro-ph/9806183v2

Mon.Not.Roy.Astron.Soc. 299 (1998) L10-L14

Astronomy and Astrophysics

Astrophysics

M.N.R.A.S., accepted July 16 1998; submitted June 4 1998; latex, 11 pages

Scientific paper

10.1046/j.1365-8711.1998.01992.x

We discuss the formation of spectral features in the decelerating ejecta of gamma-ray bursts, including the possible effect of inhomogeneities. These should lead to blueshifted and broadened absorption edges and resonant features, especially from H and He. An external neutral ISM could produce detectable H and He, as well as Fe X-ray absorption edges and lines. Hypernova scenarios may be diagnosed by Fe K-$\alpha$ and H Ly-$\alpha$ emission lines.

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