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arXiv 0905.4383astro-ph.HEastro-ph.CO
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用XMM-牛顿探测窄线Seyfert 1星系1H 0707 -495的宽铁K和L线发射

The detection of Broad Iron K and L line emission in the Narrow-Line Seyfert 1 Galaxy 1H0707-495 using XMM-Newton

A. C. Fabian, A. Zoghbi, R. R. Ross, P. Uttley, L. C. Gallo, W. N. Brandt, A. Blustin, T. Boller, M. D. Caballero-Garcia, J. Larsson, J. M. Miller, G. Miniutti,… 展开作者

A. C. Fabian, A. Zoghbi, R. R. Ross, P. Uttley, L. C. Gallo, W. N. Brandt, A. Blustin, T. Boller, M. D. Caballero-Garcia, J. Larsson, J. M. Miller, G. Miniutti, G. Ponti, R. C. Reis, C. S. Reynolds, Y. Tanaka, A. J. Young

摘要:

自从1995年在塞弗特星系MCG-6 - 30 -15中发现了第一条宽的铁-K线以来,在其他几个塞弗特星系中也发现了宽的铁-K线,它们来自吸积恒星质量的黑洞,甚至来自吸积中子星。铁-K线是突出的硬X射线连续辐射致密吸积物质产生的反射光谱。这条线的相对论性扭曲使它对黑洞的强引力和自旋很敏感。当铁丰度高时,伴随的铁-L线发射应该是可检测的。在这里,我们报告的第一个发现铁K和L的排放,使用XMM牛顿观测的窄线塞弗特1星系1H 0707 -495。明亮的Fe-L发射使我们能够第一次检测到直接X射线连续谱与落入孔中的物质反射之间的30秒混响滞后。观测到的混响时间尺度与超大质量黑洞周围最内层半径的光穿越时间相当。1H 0707 -495的光谱和时间数据的结合提供了强有力的证据,证明我们正在目睹来自引力半径内的物质的发射,或者一个光分的一小部分,来自快速旋转的大质量黑洞的事件视界。

英文摘要:

Since the discovery of the first broad iron-K line in 1995 from the Seyfert Galaxy MCG--6-30-15, broad iron-K lines have been found in several other Seyfert galaxies, from accreting stellar mass black holes and even from accreting neutron stars. The iron-K line is prominent in the reflection spectrum created by the hard X-ray continuum irradiating dense accreting matter. Relativistic distortion of the line makes it sensitive to the strong gravity and spin of the black hole. The accompanying iron-L line emission should be detectable when the iron abundance is high. Here we report the first discovery of both iron-K and L emission, using XMM-Newton observations of the Narrow-Line Seyfert 1 Galaxy 1H0707-495. The bright Fe-L emission has enabled us, for the first time, to detect a reverberation lag of 30 s between the direct X-ray continuum and its reflection from matter falling into the hole. The observed reverberation timescale is comparable to the light-crossing time of the innermost radii around a supermassive black hole. The combination of spectral and timing data on 1H0707-495 provides strong evidence that we are witnessing emission from matter within a gravitational radius, or a fraction of a light-minute, from the event horizon of a rapidly-spinning, massive black hole.

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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