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arXiv 1102.3666astro-ph.HEastro-ph.SR
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通过多波长和统计分析揭示高质量X射线双星的性质

Revealing the nature of high-mass X-ray binaries through multi-wavelength and statistical analyses

Arash Bodaghee, John A. Tomsick, Jerome Rodriguez

摘要:

我们总结了我们的长期运行的运动,以帮助了解高质量X射线双星(HMXB)的性质,强调最近的朱雀观测IGR J16207-5129和IGR J17391-3021的结果。由于我们银河系中HMXB的数量不断扩大,我们能够对HMXB的三个目前已知的子类进行更可靠的统计分析:与超巨星伴星(SGXB);与Be伴星(BEXB);以及神秘的超巨星快速X射线瞬变(SFXTs)。我们讨论了新的诊断工具,类似于“Corbet图”,其中HMXBs倾向于隔离的基础上,他们占主导地位的吸积机制。我们展示了SFXTs如何跨越BEXB和SGXB的不同人群,支持了一些SFXTs代表进化联系的有趣可能性。当我们提出HMXBs和OB恒星形成复合体的第一个空间关联函数时,我们重新审视了HMXBs作为最近大质量恒星形成示踪剂的使用。我们的研究结果表明,在距离小于几个千秒差距,从一个给定的HMXB,它更有可能有邻居,是已知的恒星形成区域,而不是从随机分布的对象。关联函数的特征尺度为HMXB进化时间尺度提供了有价值的线索。

英文摘要:

We summarize the results of our long-running campaign to help understand the nature of high-mass X-ray binaries (HMXBs), emphasizing recent Suzaku observations of IGR J16207-5129 and IGR J17391-3021. Thanks to the expanding ranks of HMXBs in our Galaxy, we are able to perform more reliable statistical analyses on the three currently-known sub-classes of HMXB: those with supergiant companions (SGXBs); those with Be companions (BEXBs); and the enigmatic Supergiant Fast X-ray Transients (SFXTs). We discuss new diagnostic tools, akin to the "Corbet diagram," in which HMXBs tend to segregate based on their dominant accretion mechanism. We show how SFXTs span across the divided populations of BEXBs and SGXBs, bolstering the intriguing possibility that some SFXTs represent an evolutionary link. The use of HMXBs as tracers of recent massive star formation is revisited as we present the first ever spatial correlation function for HMXBs and OB star-forming complexes. Our results indicate that at distances less than a few kpc from a given HMXB, it is more likely to have neighbors that are known massive-star forming regions as opposed to objects drawn from random distributions. The characteristic scale of the correlation function holds valuable clues to HMXB evolutionary timescales.

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