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arXiv 1301.4922astro-ph.HEastro-ph.CO
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喷流对吸积盘的辐照:一般性质及其对黑洞自旋测量的影响

Irradiation of an Accretion Disc by a Jet: General Properties and Implications for Spin Measurements of Black Holes

Thomas Dauser, Javier Garcia, Jörn Wilms, Moritz Böck, Laura W. Brenneman, Maurizio Falanga, Keigo Fukumura, Christopher S. Reynolds

摘要:

吸积盘的X射线照射导致强烈的反射特征,然后被相对论效应加宽和扭曲。我们提出了一个详细的,广义相对论的方法来模拟这种照射不同的几何形状的主要X射线源。这些几何形状包括旋转轴上的标准点源以及径向伸长和加速的更像射流的源。将该程序应用于相对论谱线发射的relline模型中,可以预测任何组态的谱线形状。我们研究了不同的辐射几何形状如何影响黑洞自旋的测定。宽的发射线只产生紧凑的辐射源位于靠近黑洞。这是唯一可以明确确定黑洞自旋的情况。在所有其他情况下,线的形状都更窄,这可以用低自旋或拉长的源来解释。我们的结论是,对于所有这些情况下,独立的数据的质量,没有唯一的解决方案的自旋存在,因此只有一个下限的自旋值可以给出。

英文摘要:

X-ray irradiation of the accretion disc leads to strong reflection features, which are then broadened and distorted by relativistic effects. We present a detailed, general relativistic approach to model this irradiation for different geometries of the primary X-ray source. These geometries include the standard point source on the rotational axis as well as more jet-like sources, which are radially elongated and accelerating. Incorporating this code in the relline model for relativistic line emission, the line shape for any configuration can be predicted. We study how different irradiation geometries affect the determination of the spin of the black hole. Broad emission lines are produced only for compact irradiating sources situated close to the black hole. This is the only case where the black hole spin can be unambiguously determined. In all other cases the line shape is narrower, which could either be explained by a low spin or an elongated source. We conclude that for all those cases and independent of the quality of the data, no unique solution for the spin exists and therefore only a lower limit of the spin value can be given.

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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