Sw 1644+57/GRB 110328A: THE PHYSICAL ORIGIN AND THE COMPOSITION OF THE RELATIVISTIC OUTFLOW
Sw 1644+57/GRB 110328A: THE PHYSICAL ORIGIN AND THE COMPOSITION OF THE RELATIVISTIC OUTFLOW
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DOI：
10.1088/2041-8205/734/2/l33
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发表时间：
2011-04
期刊：
影响因子：
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通讯作者：
L. Shao;Fu-Wen Zhang;Yizhong Fan;D. Wei
中科院分区：
文献类型：
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作者：
L. Shao;Fu-Wen Zhang;Yizhong Fan;D. Wei
Sw 1644+57/GRB 110328 A是由雨燕卫星探测到的一次宇宙学X射线爆发。它的早期（触发后的t = 0.1天）X射线发射类似于一些伽马射线爆发（GRB），例如，GRB 090417B但持续超过40天的晚期耀斑X射线平台使其独一无二。我们研究的可能性，爆发是一个超长的GRB供电的回落吸积到一个新生的黑洞或毫秒脉冲星，并发现这两种情况下可以解决一些，但不是所有的主要观测功能。然后，我们专注于一个（巨大的）星星的大质量黑洞的潮汐破坏模型。这颗被潮汐扰动的星星的质量估计约为几个太阳质量。一个简单/直接的参数的相对论流出的磁起源。
Sw 1644+57/GRB 110328A is a remarkable cosmological X-ray outburst detected by the Swift satellite. Its early-time (t ≲ 0.1 days since the trigger) X-ray emission resembles some gamma-ray bursts (GRBs), e.g., GRB 090417B. But the late-time flaring X-ray plateau lasting >40 days renders it unique. We examine the possibilities that the outburst is a super-long GRB powered either by the fallback accretion onto a nascent black hole or by a millisecond pulsar, and find out that these two scenarios can address some but not all of the main observational features. We then focus on the model of tidal disruption of a (giant) star by a massive black hole. The mass of the tidal-disrupted star is estimated to be ≳a few solar masses. A simple/straightforward argument for a magnetic origin of the relativistic outflow is presented.