X射线脉冲星的自转演化

发布时间：2018-01-14 21:35

本文关键词：X射线脉冲星的自转演化　出处：《南京大学》2012年博士论文　论文类型：学位论文

【摘要】：论文主要研究了X射线双星的自转速度的演化以及盘与中子星相互作用两方面内容,着重分析了低质量x射线双星4U1626-67的自转变化以及一类新近发现的伴星为OB型星的暂现源SFXT (super fast X-ray transients, SFXTs)中AXJ1841.0-0536的自转演化对其自身性质的限定。第一第二章分别阐述低质量和高质量x射线双星的主要观测特征和基本理论解释。其中第一章介绍了x射线产生与吸积、洛希瓣、吸积盘的形成、吸积盘的稳定性、ADAF盘、吸积盘与中子星的相互作用等内容。第二章对不同类别的高质量X射线双星,特别是SFXT这类源的观测与理论模型作出简要说明。第三章针对低质量X射线双星4U1626-67近20年的自转变化观测,对比吸积盘导致中子星自转变化的模型,结合观测到的QPO的变化,认为仅靠吸积盘理论无法解释其自转变化,从而引入星风与吸积盘共同存在的模型,论证QPO的变化反应盘的变化而中子星的自转变化则由吸积盘与星风共同决定。第四章考虑最近发现的SFXT中AX J1841.0-0536的光度、自转周期和轨道周期,根据DaviesPringle(1981)的演化理论由数值计算推断出初始自转周期、磁场等参量的数值范围,进而论证这个源是反磁星的可能性。最后,第五章作出一个简单的总结。
[Abstract]:In this paper, the evolution of rotation velocity of X-ray binary stars and the interaction between disk and neutron star are studied. The rotation variation of low mass x ray binary star 4U1626-67 and the temporary source SFXT of a newly discovered companion star, OB type star, are emphatically analyzed. Super fast X-ray transients. The rotation evolution of AXJ1841.0-0536 defines its own properties. In the first and second chapter, the main observational characteristics and basic theoretical explanations of low mass and high mass x-ray binary stars are described respectively. The first chapter introduces the formation of x-ray generation and accretion, Losch lobes and accretion disks. Stability of accretion disk ADAF disk, interaction between accretion disk and neutron star, etc. In particular, the observational and theoretical models of sources such as SFXT are briefly described. In the third chapter, the rotation changes of low mass X-ray binary star 4U1626-67 are observed in the past 20 years. The model of accretion disk leading to the rotation change of neutron star is compared, and the observed QPO changes are combined. It is considered that the accretion disk theory alone can not explain the variation of its rotation, thus introducing the model of the co-existence of star wind and accretion disk. It is demonstrated that the variation of the QPO reaction plate and the rotation of the neutron star are determined by the accretion disk and the star wind. Chapter 4th considers the photometric, rotation and orbital periods of ax J1841. 0-0536 found recently in SFXT. According to Davies Pringleberg's evolution theory, the numerical range of the initial rotation period, magnetic field and other parameters is deduced from the numerical calculation, and the possibility that the source is a demagnetizing star is proved. Finally, chapter 5th makes a simple summary.
【学位授予单位】：南京大学
【学位级别】：博士
【学位授予年份】：2012
【分类号】：P145.6

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