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arXiv 1502.00103astro-ph.HE
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X射线瞬变:高亮度还是低亮度?

X-ray Transients: Hyper- or Hypo-Luminous?

Jean-Pierre Lasota, Andrew R. King, Guillaume Dubus

摘要:

如果把盘的自辐照考虑在内,盘的不稳定性图象对软X射线瞬态系统的行为给出了一个合理的解释。我们表明,有一个简单的峰值亮度(在爆发开始)和衰变时标之间的关系。我们使用这个关系放置约束系统假设经历磁盘不稳定性。椭圆星系中可观测到的X射线粒子数绝大部分由长寿命的瞬变组成,这是Piro和Bildsten(2002)根据不同的理由推导出来的。ESO 243-49星系中的强变X射线源HLX-1可以被模拟为一个类似于SS 433的高度超爱丁顿恒星质量双星的盘不稳定性。对HLX-1的中等质量黑洞模型来说,不可能拟合盘不稳定性图像。其他最近发现的超级爱丁顿ULX可能会受到磁盘不稳定性的影响。

英文摘要:

The disk instability picture gives a plausible explanation for the behavior of soft X-ray transient systems if self-irradiation of the disk is included. We show that there is a simple relation between the peak luminosity (at the start of an outburst) and the decay timescale. We use this relation to place constraints on systems assumed to undergo disk instabilities. The observable X-ray populations of elliptical galaxies must largely consist of long-lived transients, as deduced on different grounds by Piro and Bildsten (2002). The strongly-varying X-ray source HLX-1 in the galaxy ESO 243-49 can be modeled as a disk instability of a highly super-Eddington stellar-mass binary similar to SS433. A fit to the disk instability picture is not possible for an intermediate-mass black hole model for HLX-1. Other, recently identified, super-Eddington ULXs might be subject to disk instability.

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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