arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0902.2840astro-ph.HEastro-ph.SR
收藏

基于圆盘反射和连续介质模型的恒星质量黑洞自旋约束

Stellar-mass Black Hole Spin Constraints from Disk Reflection and Continuum Modeling

J. M. Miller, C. S. Reynolds, A. C. Fabian, G. Miniutti, L. C. Gallo

摘要:

吸积盘的反射光谱,包括宽的铁发射线,带有强烈的多普勒频移和引力红移靠近黑洞的印记。这些位移的极端取决于最内层稳定圆形轨道与黑洞的接近程度,而该轨道由黑洞的自旋参数决定。因此,对相对论性光谱特征建模,就提供了一种估算黑洞自旋的方法。我们报告的结果,适合档案X射线光谱的恒星质量黑洞和黑洞候选人,选择强磁盘反射功能。根据最近的工作,这些光谱与反射模型和磁盘连续辐射模型(需要时),其中黑洞自旋是一个自由参数。虽然我们的结果必须被视为初步的,我们发现的证据,在我们的样本中的黑洞自旋参数范围广泛。相对论射电喷流最多的黑洞被发现具有高自旋参数,尽管在低自旋参数的黑洞中观察到喷流。对于那些有约束的二进制系统参数的源,我们检查自旋参数的分布与黑洞质量,二进制质量比,和轨道周期。我们讨论的背景下,黑洞创建事件,相对论性喷流生产,并努力探索最内层的相对论性制度周围的黑洞的结果。

英文摘要:

Accretion disk reflection spectra, including broad iron emission lines, bear the imprints of the strong Doppler shifts and gravitational red-shifts close to black holes. The extremity of these shifts depends on the proximity of the innermost stable circular orbit to the black hole, and that orbit is determined by the black hole spin parameter. Modeling relativistic spectral features, then, gives a means of estimating black hole spin. We report on the results of fits made to archival X-ray spectra of stellar-mass black holes and black hole candidates, selected for strong disk reflection features. Following recent work, these spectra were fit with reflection models and disk continuum emission models (where required) in which black hole spin is a free parameter. Although our results must be regarded as preliminary, we find evidence for a broad range of black hole spin parameters in our sample. The black holes with the most relativistic radio jets are found to have high spin parameters, though jets are observed in a black hole with a low spin parameter. For those sources with constrained binary system parameters, we examine the distribution of spin parameters versus black hole mass, binary mass ratio, and orbital period. We discuss the results within the context of black hole creation events, relativistic jet production, and efforts to probe the innermost relativistic regime around black holes.

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。

↑