Iron lines from GRBs: Clues toward the progenitor

Details Iron lines from GRBs: Clues toward the progenitor Iron lines from GRBs: Clues toward the progenitor

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001rmxac..10..182b&link_type=abstract

The Seventh Texas-Mexico Conference on Astrophysics: Flows, Blows and Glows (Eds. William H. Lee and Silvia Torres-Peimbert) Rev

Astronomy and Astrophysics

Astrophysics

Gamma-Rays: Bursts, Supernovae: General, X-Rays: Bursts

Scientific paper

We investigate the currently most popular models of gamma-ray burst (GRB) progenitors in terms of potentially observable prompt or delayed X-ray spectral features. We focus on quasi-thermal X-ray line features from ejecta of a supernova related to the GRB. In the framework of the Hypernova/Collapsar model, delayed (a few days - several months after the GRB) bursts of line-dominated, thermal X-ray emission may be expected. The He-merger scenario predicts similar X-ray emission line bursts in the days following the the GRB. These X-ray signatures should be observable with Chandra and XMM out to rather large redshifts. Weak emission line features a few days after the GRB may also result from the supranova GRB scenario. In all three cases, significant X-ray absorption features, in particular during the prompt GRB phase, are expected. No significant X-ray spectral features result from compact-object binary mergers.

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