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arXiv 1108.0396astro-ph.HE
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黑洞周围的细长吸积盘

Slim accretion disks around black holes

A. Sadowski

摘要:

在这篇论文中,我研究了薄吸积盘的流体动力学模型-对流光学厚盘,它将辐射有效薄盘的标准模型推广到所有的吸积速率。我首先对致密物体的吸积理论作一个一般性的介绍。接着推导出常用的薄磁盘标准模型。在随后的一节中,我将介绍描述细长圆盘的方程,解释我用来求解它们的数值方法,并讨论这些解的性质。给出了非定常方程的一般推导,并给出了热不稳定吸积盘的时间演化。我介绍一个国家的最先进的方法耦合的径向和垂直结构的平流吸积盘,并讨论它带来的改进垂直平均的解决方案。本文还提出了一个自发光细长吸积盘的数值模型。最后,介绍并讨论了细长吸积盘的应用:基于高光度数据的X射线连续拟合估算LMC X-3中心黑洞的自旋,超临界吸积流对黑洞自旋的影响以及磁流体动力学全球模拟的归一化。

英文摘要:

In this thesis, I study hydrodynamical models of slim accretion disks --- advective, optically thick disks which generalize the standard models of radiatively efficient thin disks to all accretion rates. I start with a general introduction to the theory of accretion onto compact objects. It is followed by a derivation of the commonly-used standard models of thin disks. In the subsequent section I introduce the equations describing slim disks, explain the numerical methods I used to solve them and discuss properties of such solutions. I also give a general derivation of non-stationary equations and present the time evolution of thermally unstable accretion disks. I introduce a state-of-the-art approach coupling the radial and vertical structures of an advective accretion disk and discuss the improvements it brings to vertically-averaged solutions. I also present a numerical model of self-illuminated slim accretion disks. Finally, I present and discuss applications of slim accretion disks: estimating of spin of the central black hole in LMC X-3 through X-ray continuum fitting basing on high-luminosity data, spinning-up of black holes by super-critical accretion flows and normalizing of magnetohydrodynamical global simulations.

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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