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arXiv 1503.01087astro-ph.HE
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高质量X射线双星的基本性质

Fundamental properties of High-Mass X-ray Binaries

A. González-Galán

摘要:

这篇博士论文的目的是描述由4个源形成的超巨星X射线双星(SGXB)的代表性样本:XTE J1855-026,具有长期稳定的X射线通量的经典SGXB; AX J1841.0-0535和AX J1845.0-0433,两个超巨星快速X射线瞬变(SFXT),其X射线发射主要由耀斑控制;和IGR J 00370 +6122,介于这两个亚组之间。产生这些可观察到的差异的物理过程仍然是一个有争议的问题。在这篇博士论文中,我对这4种不同的系统进行了研究,以提供新的数据来约束模型。这项研究包括:(一)确定的轨道解决方案,(二)沿轨道的风行为的系统研究,通过测量的H α变化,(三)的施主星的恒星大气模型,(四)建立是否有X射线通量的变化调制的轨道周期。风的研究表明,Halalpha的变化是由内在的风过程。恒星大气研究表明,这些双星的超巨星有更高的投影旋转速度,更高的He丰度和更高的N/C比孤立的超巨星。研究结果表明,双星的偏心率与不同子群的X射线通量的差异并不存在简单的相关关系。因此,更加复杂的设想得到了巩固。IGR J 00370 +6122是一种新的系统,其性质不适合任何已建立的子组,这一发现加强了观察到的性质中的连续性的想法,而不是严格的系统分类。此外,我已经开发了一个管道来减少利物浦望远镜的FRODOSpec光谱仪的光谱,该光谱仪针对我们在这些SGXB中发现的模糊超巨星的红色光谱进行了优化。

英文摘要:

The aim of this PhD Thesis is to characterize a representative sample of Supergiant X-ray Binaries (SGXBs) formed by 4 sources: XTE J1855-026, a classical SGXB with long-term stable X-ray flux; AX J1841.0-0535 and AX J1845.0-0433, two supergiant fast X-ray transients (SFXTs) with the X-ray emission mostly dominated by flaring; and IGR J00370+6122, something in between these 2 sub-groups. The physical processes that produce these observable differences are still a matter of debate. In this PhD Thesis I performed a study of these 4 different systems to provide new data to constrain the models. This study consists of:(i) the determination of the orbital solution,(ii) a systematic study of the wind behavior along the orbit by the measure of Halpha variations,(iii) a model of stellar atmospheres of the donor star,(iv) establish whether there are X-ray flux variations modulated by the orbital period. The study of the wind shows that Halpha variations are dominated by intrinsic wind processes. The stellar atmospheres study shows that the supergiant stars that harbor these binaries have a higher projected rotational velocity, higher He abundance and higher N/C ratio than that of isolated supergiant stars. The results of this study show that the eccentricity of the binary does not have a simple correlation with the differences in the X-ray flux of the different sub-groups. Therefore, the idea of a more complex scenario is consolidated. The discovery of a new type of system, IGR J00370+6122, which properties do not fit in any of the established sub-groups, reinforces the idea of a continuum in the observed properties more than a strict classification of systems. Furthermore, I have developed a pipeline to reduce spectra of the FRODOSpec spectrograph at the Liverpool Telescope optimized for the reduction of the red spectra of the obscured supergiants that we find in these SGXBs.

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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