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arXiv 1102.4358astro-ph.HE
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LMXB光度函数对双星演化的约束

Binary Evolution Constraints from Luminosity Functions of LMXBs

R. Voss

摘要:

低质量X射线双星(LMXB)的形成和演化还没有得到很好的理解。LMXB群体的性质取决于二元进化的许多不确定方面,群体研究提供了一种相对较新的探索二元相互作用的方法。我们已经研究了形状的X射线光度函数(LF)的LMXB在附近的星系与钱德拉和银河系使用雨燕全天空监测器的暗端。我们发现球状星团(GCs)中LMXB的LF与外面的LMXB有明显的区别,相对缺乏微弱的GCs源。这表明这两个群体的组成有所不同。

英文摘要:

The formation and evolution of low-mass X-ray binaries (LMXBs) is not well understood. The properties of a population of LMXBs depend on a number of uncertain aspects of binary evolution, and population studies offers a relatively new way of probing binary interactions. We have studied the shape of the faint end of the X-ray luminosity function (LF) of LMXBs in nearby galaxies with Chandra and in the Milky Way using the Swift all-sky monitor. We find a clear difference between the LF of LMXBs in globular clusters (GCs) and those outside, with a relative lack of faint GC sources. This indicates a difference in the composition of the two populations.

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