Barres de Almeida 2011 GRB110328A可能是潮汐破坏一个恒星的证据

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Title:		Enhanced emission from GRB 110328A could be evidence for tidal disruption of a star
Authors:		Barres de Almeida, Ulisses; De Angelis, Alessandro
Publication:		eprint arXiv:1104.2528
Publication Date:		04/2011
Origin:		ARXIV
Keywords:		Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Extragalactic Astrophysics
Bibliographic Code:		2011arXiv1104.2528B

Abstract

On March 28, Swift's Burst Alert Telescope discovered a source in the constellation Draco when it erupted in a series of X-ray blasts. The explosion, catalogued as gamma-ray burst (GRB) 110328A, repeatedly flared in the following days, making the interpretation of the event as a GRB unlikely. Here we suggest that the event could be due to the tidal disruption of a star that approaches the pericentric distance of a black hole, and we use this fact to derive bounds on the physical characteristics of such system, based on the variability timescales and energetics of the observed X-ray emission.

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