The Second Plateau in X-Ray Afterglow Providing Additional Evidence for Rapidly Spinning Magnetars as the GRB Central Engine
The Second Plateau in X-Ray Afterglow Providing Additional Evidence for Rapidly Spinning Magnetars as the GRB Central Engine
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X射线余辉的第二个平台为快速旋转的磁星作为GRB中央引擎提供了额外的证据
DOI：
10.3847/1538-4357/ab8f91
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发表时间：
2020-05
影响因子：
4.9
通讯作者：
Xie Wei
中科院分区：
文献类型：
--
作者：
Zhao Litao;Liu Liangduan;Gao He;Lan Lin;Lei WeiHua;Xie Wei
Evidence for the central engine of gamma-ray bursts (GRBs) has been collected in the Neil Gehrels Swift data. For instance, some GRBs show an internal X-ray plateau followed by very steep decay, which is difficult interpret within the framework of a black hole (BH) central engine, but is consistent within a rapidly spinning magnetar engine picture. The very steep decay at the end of the plateau suggests a sudden cessation of the central engine, which is explained as the collapse of a supramassive magnetar into a BH when it spins down. Here we propose that some additional evidence, such as a second X-ray plateau feature, would show up if the fallback accretion could activate the newborn BH and sufficient energy could be transferred from the newborn BH to the GRB blast wave. With a systematic data analysis for all long GRBs, we find three candidates in the Swift sample, i.e., GRBs 070802, 090111, and 120213A, whose X-ray afterglow lightcurves contain two plateaus, with the first one being an internal plateau. We find that in a fairly loose and reasonable parameter space, the second X-ray plateau data for all 3 GRBs could be interpreted with our proposed model. Future observations are likely to discover similar events, which could offer more information on the properties of the magnetar, as well as the newborn BH.
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DOI：
10.1086/320255
发表时间：
2000-11
期刊：
The Astrophysical Journal Letters
影响因子：
--
作者：
Bing Zhang;P. Mészáros
通讯作者：
Bing Zhang;P. Mészáros
Sw J1644 57 和 Sw J2058 05 中的黑洞旋转
影响因子：
7.9
作者：
Zhang, Bing;Lei, Wei-Hua
通讯作者：
Lei, Wei-Hua
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DOI：
10.3847/1538-4365/ab4711
发表时间：
2019-05
期刊：
The Astrophysical Journal Supplement Series
影响因子：
--
作者：
Tang Chen-Han;Huang Yong-Feng;Geng Jin-Jun;Zhang Zhi-Bin
通讯作者：
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DOI：
10.1086/168066
发表时间：
1989-11
期刊：
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影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
Z. Dai;T. Lu