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arXiv 1206.2887astro-ph.HE
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GRB 090618:Ib/c型超新星导致中子星引力坍缩为黑洞的第一例

GRB 090618: The First Example of a Neutron Star Gravitational Collapse to a Black Hole Induced by a Type Ib/c Supernova

L. Izzo, Jorge A. Rueda, R. Ruffini

摘要:

最近提出了一个新的概念,用Ib/c型超新星爆炸引起的中子星引力坍缩成黑洞来解释伽玛射线暴(GRB)与超新星(SN)的时间重合。我们将这些考虑应用于GRB 090618的例外情况,对于GRB 090618,有证据表明在GRB发生后的几天内存在SN $\sim 10$。计算了起源于伴星演化的SN Ib/c到NS上的吸积速率和吸积总质量。结果表明,NS在几秒钟内达到临界质量,并经历引力坍缩到BH导致伽玛暴的发射。我们发现NS伴星$M_{\rm NS}$和SN核心前身$M_{\rm core}$的质量范围如下:$1.8\lesssim M_{NS}/M_\odot \lesssim 2.1$和$3\leq M_{\rm core}/M_\odot \leq 8$。最后,我们讨论了这些考虑的互补性的替代过程解释长和短的伽玛暴。

英文摘要:

A novel concept has been recently proposed for explaining the temporal coincidence of some Gamma Ray Bursts (GRBs) with an associated Supernova (SN) in terms of the gravitational collapse of a neutron star (NS) to a Black Hole (BH), induced by a type Ib/c SN explosion. We apply these considerations to the exceptional case of GRB 090618, for which there is evidence of a SN $\sim 10$ days after the GRB occurrence. We calculate the accretion rate and total accreted mass onto a NS from a SN Ib/c originated from a companion evolved star. It is shown that the NS reaches in a few seconds the critical mass and undergoes gravitational collapse to a BH leading to the emission of a GRB. We find for the mass of the NS companion, $M_{\rm NS}$, and for the SN core progenitor, $M_{\rm core}$, the following mass ranges: $1.8\lesssim M_{NS}/M_\odot \lesssim 2.1$ and $3\leq M_{\rm core}/M_\odot \leq 8$. Finally, we discuss the complementarity of these considerations to alternative processes explaining long and short GRBs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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