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29 March 2024
 
  » arxiv » astro-ph/0407626

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X-ray Lines in Gamma-ray Bursts and Cerenkov Line Mechanism
Wei Wang ;
Date 30 Jul 2004
Journal Astrophys.Space Sci. 297 (2005) 415
Subject astro-ph
AbstractX-ray emission and absorption features are of great importance in our understanding the nature and environment of gamma-ray bursts (GRBs). So far, iron emission lines have been detected in at least four GRB afterglows. In this paper, the observational properties and physical constraints on materials surrounding GRB sources are reviewed, and several classes of theoretical models are also discussed. We will specially concentrate on the Cerenkov line mechanism, in which the broad iron lines are expected, and a small mass of Fe is required to produce the large line luminosity. In addition, our interpretation can favor the recent jet unified model for different classes of gamma-ray bursts with a standard energy reservoir.
Source arXiv, astro-ph/0407626
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