伽玛暴(Gamma-Ray Burst)笔记。记录有关伽玛暴的新文章,另外也包括看的老文章、自己的想法、以及跟天文相关的一些东西。 Feel free to leave me a message by comments or by email.

星期日, 七月 29, 2007

Brown 2007 有几个银河系的源可能是伽玛暴的遗迹

主要内容:
认为Nova Sco (GRO J1655-40), Il Lupi (4U 1543-47), XTE J1550-564 and GS 2023+338可能是伽玛暴和hypernova的遗迹。它们的伴星的质 量较小,另有一些伴星质量较大的不能形成伽玛暴。

精彩摘抄:


文章信息:

arXiv:0707.4008 [ps, pdf, other]
Title: GRBs and Hypernova Explosions of Some Galactic Sources
Comments: 3 pages, 1 figures
Subjects: Astrophysics (astro-ph)

We show that Nova Sco (GRO J1655-40), Il Lupi (4U 1543-47), XTE J1550-564 and GS 2023+338 are relics of gamma-ray burst (GRB) and Hypernova explosions. They had more than enough rotational energy to power themselves. In fact, they had so much energy that they would have disrupted the accretion disk of the black hole that powered them by the communicated rotational energy, so that the energy delivery was self limiting. The most important feature in producing high rotational energy in the binary is low donor (secondary star) mass. We suggest that V4641 Sgr (XTE J1819-254) and GRS 1915+105 underwent less energetic explosions; because of their large donor masses. These explosions were one or two orders of magnitude lower in energy than that of Nova Sco. None the less their rotational energy should have been enough to power GRBs and Hypernovae without dismantling the black hole disk. Cyg X-1 (1956+350) had an even less energetic explosion, because of an even larger donor mass.

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