X-ray Lines in Gamma-ray Bursts and Cerenkov Line Mechanism
Author: Wang, Wei
Source: Astrophysics and Space Science, Volume 297, Numbers 1-4, June 2005 , pp. 415-422(8)
Abstract:X-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.
Document Type: Research Article
Affiliations: National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012, China, Email: email@example.com
Publication date: June 2005