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arXiv 2402.08623astro-ph.HEastro-ph.CO
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GRB 231115A —— M82星系中的一起磁星巨耀发

GRB 231115A -- a magnetar giant flare in the M82 galaxy

P. Yu. Minaev, A. S. Pozanenko, S. A. Grebenev, I. V. Chelovekov, N. S. Pankov, A. A. Khabibullin, R. Ya. Inasaridze, A. O. Novichonok

AI总结:

基于INTEGRAL和Fermi数据,研究了雪茄星系内的短伽马射线暴GRB 231115A,通过能谱、无光学余辉及引力波信号等证据,将其解释为首个精确定位的河外软伽马射线复现器(SGR)磁星巨耀发。

摘要:

本文基于 INTEGRAL 和 Fermi 空间天文台的数据,介绍了对短伽马射线暴 GRB 231115A 在 X 射线和伽马射线波段的研究结果。该暴源由 INTEGRAL 天文台的 IBIS/ISGRI 望远镜以 $\leq$ 1.5 角分的精度进行定位,位于雪茄星系(M 82)内。利用 ISON-Kitab 天文台的 36 厘米望远镜和 Abastumani 天体物理台的 70 厘米望远镜 AS-32 对暴源定位区域进行了早期的光学后续观测,未探测到光学辐射。宿主星系的邻近性($D_L \simeq$ 3.5 Mpc)显著限制了该事件的能量学($E_{iso}\ \sim\ 10^{45}$ erg),并使我们能够将该暴解释为先前未知的软伽马射线复现器(SGR)的巨耀发,这是一种高度磁化中子星(磁星)活动的极端表现。对于宇宙学伽马射线暴而言非典型的硬能谱,以及光学余辉和引力波信号的缺失,证实了这一结论;如果该暴是由双中子星并合引起的,那么这些信号本应被 LIGO/Virgo/KAGRA 实验探测到。该暴在 $E_{p,i}$ -- $E_{iso}$ 和 $T_{90,i}$ -- $EH$ 图中的位置也表明 GRB 231115A 是一起磁星巨耀发。这是首个精确定位的河外 SGR 巨耀发。

英文摘要:

The results of a study of the short gamma-ray burst GRB 231115A in the X-ray and gamma-ray ranges are presented, based on data from the INTEGRAL and Fermi space observatories. The source of the burst is localized by the IBIS/ISGRI telescope of INTEGRAL observatory with an accuracy of $\leq$ 1.5 arcmin, it is located in the Cigar Galaxy (M 82). Early follow-up observations of the burst localization region were carried out in the optical range with the 36-cm telescope of the ISON-Kitab observatory and the 70-cm telescope AS-32 of the Abastumani Astrophysical Observatory, the optical emission has not been detected. The proximity of the host galaxy ($D_L \simeq 3.5$ Mpc) significantly limits energetics of the event ($E_{iso}\ \sim\ 10^{45}$ erg) and allows us to interpret the burst as a giant flare of a previously unknown soft gamma repeater (SGR) which is an extreme manifestation of the activity of a highly magnetized neutron star (magnetar). This conclusion is confirmed by the energy spectrum atypically hard for cosmological gamma-ray bursts, as well as the absence of optical afterglow and gravitational wave signal, which should have been detected in the LIGO/Virgo/KAGRA experiments if the burst was caused by a merger of binary neutron stars. The location of the burst in the $E_{p,i}$ -- $E_{iso}$ and $T_{90,i}$ -- $EH$ diagrams also suggests that GRB 231115A was a magnetar giant flare. This is the first well-localized giant flare of an extragalactic SGR.

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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