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arXiv 2306.03365astro-ph.HE
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与超新星和千新星相关的伽马射线暴的性质

Properties of Gamma-Ray Bursts Associated with Supernovae and Kilonovae

Q. M. Li, Z. B. Zhang, X. L. Han, K. J. Zhang, X. L. Xia, C. T. Hao

AI总结:

本文系统比较了53个超新星相关和15个千新星相关的伽马射线暴的时谱性质,发现二者光谱参数分布一致且均遵循各自的Amati关系,光度-滞后和光度-时间关系存在大量重叠,提示它们可能共享相同辐射机制。

摘要:

我们系统地比较了53个超新星(SN)相关和15个千新星(KN)相关的伽马射线暴(GRBs)的时间和光谱性质。我们发现两类GRBs的光谱参数呈相同的对数正态分布,与普通GRBs一致。SN/GRBs和KN/GRBs的辐射热光度呈三重形式,其中SN/GRBs的相应拐点光度比KN/GRBs大约两个数量级。我们在实验室系中建立了光谱滞后与瞬时γ射线光度之间的幂律关系,SN/GRBs的指数为-1.43±0.33,KN/GRBs的指数为-2.17±0.57,分别与静止系中的值一致。我们验证了SN/GRBs和KN/GRBs均遵循各自的Amati关系,分别与长暴和短暴的Amati关系相符。通过分析具有良好平台段的X射线余辉,我们建立了X射线光度与平台时间之间的幂律关系,KN/GRBs的指数为-1.12±0.17,SN/GRBs的指数为-1.08±0.22,这可以由能量注入驱动的相对论激波很好地解释。光度-滞后图、Amati关系图和光度-时间图显示两类GRBs之间存在大量重叠,表明尽管它们源自不同的前身星或中心引擎,但可能共享相同的辐射机制。

英文摘要:

We systematically compare the temporal and spectral properties of 53 Supernova (SN)-associated and 15 Kilonova (KN)-associated Gamma-Ray Bursts (GRBs). We find that the spectral parameters of both types GRBs are identically and lognormally distributed, consistent with those normal GRBs. The bolometric luminosities of SN/GRBs and KN/GRBs have a triple form with the corresponding break luminosities of SN/GRBs are roughly two orders of magnitude larger than those of KN/GRBs. We build the power-law relations between the spectral lag and the luminosity of prompt $γ$-rays with indices of $-1.43\pm0.33$ for SN/GRBs and $-2.17\pm0.57$ for KN/GRBs in the laboratory frame, which are respectively coincident with the rest-frame values. We verify that both SN/GRBs and KN/GRBs comply with their own Amati relations that match those of long and short GRBs, respectively. Analyzing X-ray afterglows with good plateau segments, we build the power-law relations between the X-ray luminosity and the plateau time with an index of $-1.12\pm0.17$ for KN/GRBs and $-1.08\pm0.22$ for SN/GRBs, which can be well explained by the relativistic shock driven by an energy injection. The plots of luminosity-lag, Amati relation and luminosity-time show heavy overlap between the two types of GRBs, implying that they might share the same radiation mechanism despite originating from different progenitors or central engines.

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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