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arXiv 0709.0143astro-ph
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吸积黑洞低硬态中内冷子的存在性

The Existence of Inner Cool Disks in the Low Hard State of Accreting Black Holes

B. F. Liu, Ronald E. Taam, E. Meyer-Hofmeister, F. Meyer

摘要:

本文研究了低硬态黑洞X射线瞬态系统中物质从日冕到光学厚度较厚的冷内盘的凝聚。一个简单的模型的能量和质量之间的交换日冕和磁盘起源于热传导的描述,考虑到康普顿冷却的电晕的光子从下面的磁盘的效果。结果发现,一个弱的,凝聚馈内盘可以存在于低硬态的黑洞瞬态系统的光度范围取决于粘度参数的大小。对于$α\sim 0.1-0.4$,对于$\sim 0.001- 0.02$爱丁顿值范围内的亮度,可以存在内部盘。将该模型应用于黑洞候选源GX 339-4和Swift J1753.5-0127的低硬态X射线观测。结果发现,康普顿冷却是重要的冷凝过程中,导致在这两个系统中的冷内盘的维护。由于蒸发/凝聚模型的结果与黑洞质量无关,因此认为这种内冷盘可能对低光度活动星系核的光学和紫外辐射有贡献。

英文摘要:

The condensation of matter from a corona to a cool, optically thick inner disk is investigated for black hole X-ray transient systems in the low hard state. A description of a simple model for the exchange of energy and mass between corona and disk originating from thermal conduction is presented, taking into account the effect of Compton cooling of the corona by photons from the underlying disk. It is found that a weak, condensation-fed inner disk can be present in the low hard state of black hole transient systems for a range of luminosities which depend on the magnitude of the viscosity parameter. For $α\sim 0.1-0.4$ an inner disk can exist for luminosities in the range $\sim 0.001- 0.02$ Eddington value. The model is applied to the X-ray observations of the black hole candidate sources GX 339-4 and Swift J1753.5-0127 in their low hard state. It is found that Compton cooling is important in the condensation process, leading to the maintenance of cool inner disks in both systems. As the results of the evaporation/condensation model are independent of the black hole mass, it is suggested that such inner cool disks may contribute to the optical and ultraviolet emission of low luminosity active galactic nuclei.

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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