The Nature of the Giant Outbursts in the Bursting Pulsar GRO J1744–28
The Nature of the Giant Outbursts in the Bursting Pulsar GRO J1744–28
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DOI：
10.1086/310167
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发表时间：
1996-05
期刊：
影响因子：
--
通讯作者：
J. Cannizzo
中科院分区：
文献类型：
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作者：
J. Cannizzo
我们研究了在GRO J1744-28中看到的巨大爆发中吸积盘不稳定性的可能作用。具体来说，我们研究了全球性的，随时间变化的Lightman-Eardley不稳定性，它可以开发的吸积盘的内边缘附近时，辐射压力变得可比的气体压力。一般来说，我们的结果与Taam & Lin和Lasota & Pelat的早期工作是兼容的。GRO J1744-28的独特性似乎与这样一个约束有关，即为了使爆发发生，内边缘的吸积速率必须在一个狭窄的范围内，刚好高于辐射压力开始变得显着的临界吸积速率。
We investigate the possible role of an accretion disk instability in producing the giant outbursts seen in GRO J1744-28. Specifically, we study the global, time-dependent evolution of the Lightman-Eardley instability, which can develop near the inner edge of an accretion disk when the radiation pressure becomes comparable to the gas pressure. Broadly speaking, our results are compatible with earlier works by Taam & Lin and by Lasota & Pelat. The uniqueness of GRO J1744-28 appears to be associated with the constraint that, in order for outbursts to occur, the rate of accretion at the inner edge must be within a narrow range just above the critical accretion rate at which radiation pressure is beginning to become significant.