候选黑洞吸积盘的X射线能谱

K. Ebisawa
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引用次数: 0

摘要

我将回顾主要的吸积盘光谱模型,这些模型已经被用来拟合观测到的候选黑洞和低质量x射线双星的x射线光谱。根据最近对候选黑洞的光度/光谱变化的观测,对这些光谱模型进行了比较。虽然吸积盘的局部发射不会是黑体,但黑体盘模型可以根据质量吸积率的变化和中心物体的恒定质量来解释观测到的光度/光谱变化。黑体盘模型的成功推导表明,黑体盘的色温与有效温之比(Tcol/Teff)沿盘的半径和盘的光度变化是恒定的。Titarchuk(1993)对吸积盘光谱模型的精确计算考虑了复合体和辐射转移,成功地再现了观测结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
X‐ray energy spectra from accretion disks in black hole candidates
I will review major accretion disk spectral models which have been used to fit observed x‐ray spectral of black hole candidates and low mass x‐ray binaries. These spectral models are compared in the light of recent observations of luminosity/spectral variations of black hole candidates. Blackbody disk models can explain the observed luminosity/spectral variations in terms of variation of the mass accretion rate and constant mass of the central object, although the local emission of accretion disk will not be a blackbody. Because of the Comptonization, color temperature of the local emission will be significantly larger than the effective temperature, and success of the blackbody disk model suggests the color to the effective temperature ratio (Tcol/Teff) is constant along the disk and radius and disk luminosity variations. Precise calculation of accretion disk spectral models by Titarchuk (1993) taking account of Comptonization and radiative transfer reproduced the observed results successfully.
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