Properties of long gamma-ray bursts from massive compact binaries

被引:0
作者
Church, Ross P. [1 ]
Levan, Andrew J. [2 ]
Davies, Melvyn B. [1 ]
Kim, Chunglee [3 ]
机构
[1] Lund Univ, Dept Astron & Theoret Phys, Lund Observ, S-22100 Lund, Sweden
[2] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England
[3] W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA
来源
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES | 2013年 / 371卷 / 1992期
关键词
gamma-ray bursts; stars: binary; stars: black holes; supernovae; SUPERNOVAE; FLARES; ORIGIN; RATES;
D O I
10.1098/rsta.2012.0230
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
We consider the implications of a model for long-duration gamma-ray bursts in which the progenitor is spun up in a close binary by tidal interactions with a massive black-hole companion. We investigate a sample of such binaries produced by a binary population synthesis, and show that the model predicts several common features in the accretion on to the newly formed black hole. In all cases, the accretion rate declines as approximately t(-5/3) until a break at a time of order 10(4) s. The accretion rate declines steeply thereafter. Subsequently, there is flaring activity, with the flare peaking between 10(4) and 10(5) s, the peak time being correlated with the flare energy. We show that these times are set by the semi-major axis of the binary, and hence the process of tidal spin-up; furthermore, they are consistent with flares seen in the X-ray light curves of some long gamma-ray bursts.
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页数:4
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