Liu Xue-Wen 2009 磁能注入解释GRB 080913的余辉

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Title:		Magnetic Energy Injection in GRB 080913
Authors:		Xue-Wen, Liu; Xue-Feng, Wu; Tan, Lu
Publication:		eprint arXiv:0907.1767
Publication Date:		07/2009
Origin:		ARXIV
Keywords:		Astrophysics - Cosmology and Extragalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Comment:		3 pages, pdf only. accepted for publication in Science in China Series G
Bibliographic Code:		2009arXiv0907.1767X

Abstract

GRB 080913, with a spectroscopically determined redshift of z=6.7, was the record holder of the remotest stellar object before the discovery of the recent gamma-ray burst GRB 090423, whose redshift is about 8.2. The gradually accumulated high redshift GRB sample has shed light on the origin and physics of GRBs during the cosmic re-ionization epoch. We here present a detailed numerical fit to the multi-wavelength data of the optical afterglow of GRB 080913 and then constrain its circum-burst environment and the other model parameters. We conclude that the late optical/X-ray plateau at about one day since the burst is due to the Poynting-flux dominated injection from the central engine which is very likely a massive spinning black hole with super strong magnetic fields.

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