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arXiv 1312.0922astro-ph.HE
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候选黑洞4U 1630-472的盘发射和大气吸收线

Disk emission and atmospheric absorption lines in black hole candidate 4U 1630-472

A. Rozanska, J. Madej, P. Baginska, K. Hryniewicz, B. Handzlik

摘要:

我们重新分析了处于高/软状态的黑洞候选者4U 1630-472的SUZAKU数据。结果表明,具有铁吸收线的4U 1630-472的连续X射线谱可以用来自吸积盘大气的谱满意地模拟。起源于热吸积盘大气的高度电离铁的吸收线可以作为对通常支持这类源的风模型的替代或补充解释。我们使用一个单一的模型模型的连续谱和线光谱。高度电离铁的吸收线可以起源于由于盘的高温而本质上是热的盘大气的上部。用自然、热和压力加宽计算的铁谱线轮廓与观测结果非常吻合。结果表明,吸积盘大气能有效地产生4U 1630-472谱中的铁吸收线。在吸积盘大气中产生的吸收线是观测到的谱线轮廓的重要组成部分,即使还有其他机制对吸收特征负责。然而,当连续体和线作为单独的模型分量进行拟合时,风理论可能是拟合过程的一个伪像。

英文摘要:

We re-analyzed SUZAKU data of the black hole candidate 4U 1630-472 being in the high/soft state. We show that the continuum X-ray spectrum of 4U 1630-472 with iron absorption lines can be satisfactorily modeled by the spectrum from an accretion disk atmosphere. Absorption lines of highly ionized iron originating in hot accretion disk atmosphere can be an alternative or complementary explanation to the wind model usually favored for these type of sources. We model continuum and line spectra using a single model. Absorption lines of highly ionized iron can origin in upper parts of the disk atmosphere which is intrinsically hot due to high disk temperature. Iron line profiles computed with natural, thermal and pressure broadenings match very well observations. We showed that the accretion disk atmosphere can effectively produce iron absorption lines observed in 4U 1630-472 spectrum. Absorption line arising in accretion disk atmosphere is the important part of the observed line profile, even if there are also other mechanisms responsible for the absorption features. Nevertheless, the wind theory can be an artifact of the fitting procedure, when the continuum and lines are fitted as separate model components.

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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