Corsi, Alessandra 2009 毫秒磁星产生伽玛暴

主要内容:
解释X射线的平台. 预测产生的引力波的观测效应.

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Title:		GRB afterglow plateaus and Gravitational Waves: multi-messenger signature of a millisecond magnetar?
Authors:		Corsi, Alessandra; Meszaros, Peter
Publication:		eprint arXiv:0907.2290
Publication Date:		07/2009
Origin:		ARXIV
Keywords:		Astrophysics - Cosmology and Extragalactic Astrophysics
Comment:		9 pages, 3 figures, accepted for publication in ApJ
Bibliographic Code:		2009arXiv0907.2290C

Abstract

The existence of a shallow decay phase in the early X-ray afterglows of gamma-ray bursts is a common feature. Here we investigate the possibility that this is connected to the formation of a highly magnetized millisecond pulsar, pumping energy into the fireball on timescales longer than the prompt emission. In this scenario the nascent neutron star could undergo a secular bar-mode instability, leading to gravitational wave losses which would affect the neutron star spin-down. In this case, nearby gamma-ray bursts with isotropic energies of the order of 1e50 ergs would produce a detectable gravitational wave signal emitted in association with an observed X-ray light-curve plateau, over relatively long timescales of minutes to about an hour. The peak amplitude of the gravitational wave signal would be delayed with respect to the gamma-ray burst trigger, offering gravitational wave interferometers such as the advanced LIGO and Virgo the challenging possibility of catching its signature on the fly.

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