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arXiv 1503.06791astro-ph.HE
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短伽马射线暴中的长持续黑洞喷流

Long-Lasting Black-Hole Jets in Short Gamma-Ray Bursts

Shota Kisaka, Kunihito Ioka

摘要:

中子星双星并合后产生的短伽马射线暴是由黑洞还是中子星引起的,是一个关键问题。我们提出了一个BH模型,解释了短的伽玛暴与持久的活动,如延长发射和平台发射高达$\sim10000$ s。为了提取BH旋转能量,磁场的拓扑演化应该伴随着质量喷射、质量回落和磁场重联。观测结果表明,磁场在BH处从$\sim10^{14}$ G衰减到$\sim10^{13} - 10^{11}$ G,并以合并前的强度为界,在光度恒定的情况下保持恒定,而$\sim10^{-4} - 10^{-2} M_{\odot}$的回落质量与GRB 130603 B中macronova(或kilonova)暗示的喷出物质量相当。BH模型对引力波和NS物质的状态方程都有意义。

英文摘要:

Whether a short gamma-ray burst (GRB) is caused by a black hole (BH) or a neutron star (NS) after the merger of a NS binary is a crucial problem. We propose a BH model that explains short GRBs with long-lasting activities such as extended emission and plateau emission up to $\sim10000$ s. To extract the BH rotational energy, the topological evolution of the magnetic field should accompany the mass ejection, mass fallback, and magnetic field reconnection. The observations suggest the magnetic field decay from $\sim10^{14}$ G to $\sim10^{13} - 10^{11}$ G at the BH, bounded below by the pre-merger strength and kept constant while the luminosity is constant, and the fallback mass of $\sim10^{-4} - 10^{-2} M_{\odot}$, comparable to the ejecta mass implied by the macronova (or kilonova) in GRB 130603B. The BH model has implications for gravitational waves and the equation of state of NS matter.

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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