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首页> 外文期刊>The Astrophysical Journal. Supplement Series >Statistical Study of Gamma-Ray Bursts with a Plateau Phase in the X-Ray Afterglow
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Statistical Study of Gamma-Ray Bursts with a Plateau Phase in the X-Ray Afterglow

机译：在X射线余辉中用高原相突发的γ射线突发的统计研究

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A plateau phase in the X-ray afterglow is observed in a significant fraction of gamma-ray bursts (GRBs). Previously, a correlation among three key parameters concerning the plateau phase is found to exist, i.e., the end time of the plateau phase in the GRB rest frame (T-a), the corresponding X-ray luminosity at the end time (L-X) and the isotropic energy of the prompt GRB (E-gamma,E-iso). In this study, we systematically search through all the Swift GRBs with a plateau phase that occurred between 2005 May and 2018 August. We collect 174 GRBs, with redshifts available for all of them. For the whole sample, the correlation between L-X, T-a, and E-gamma,E-iso is confirmed, with the best-fit relation being L-X proportional to T-a(-1.01), E-gamma,iso(0.84). Such an updated three-parameter correlation still supports that the central leftover after GRBs is probably a millisecond magnetar. Note that short GRBs with durations less than 2 s in our sample also follow the same correlation, which hints that the merger production of two neutron stars could be a high-mass magnetar but not necessarily a black hole. Moreover, GRBs with an "internal" plateau (i.e., with a following decay index being generally smaller than -3) also obey this correlation. It further strengthens the idea that the internal plateau is due to the delayed collapse of a high-mass neutron star into a black hole. The updated three-parameter correlation indicates that GRBs with a plateau phase may act as a standard candle for cosmology study.
机译：在γ射线爆发（GRBS）的大部分中观察到X射线余釉中的平台相。以前，发现了关于高原相的三个关键参数之间的相关性，即GRB静止框架（TA）中的平台相的结束时间，结束时间（LX）和X射线发光度提示GRB（E-GAMMA，E-ISO）的各向同性能量。在这项研究中，我们系统地搜索了所有SWIFT GRB，在2005年5月和2018年8月期间发生了高原阶段。我们收集了174个GRB，为所有人提供了红移。对于整个样本，确认L-X，T-A和E-γ和E-ISO之间的相关性，最佳拟合关系是与T-A（-1.01），E-Gamma，ISO（0.84）成比例。这种更新的三个参数相关性仍然支持GRBS可能是毫秒磁场后的中央剩余。注意，在我们的样本中持续不到2秒的短GRB也遵循相同的相关性，这提示了两个中子恒星的合并产生可以是高块状磁场，但不一定是一个黑洞。此外，具有“内部”高原的GRB（即，具有以下衰减指数通常小于-3）也遵循这种相关性。它进一步加强了内部平台的想法是由于高质量中子星的延迟坍塌到黑洞。更新的三个参数相关表明，具有平台阶段的GRB可以作为宇宙学研究的标准蜡烛。

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