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arXiv 1601.05367astro-ph.GAastro-ph.HE
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从PG 1211+143高度电离风中第二个高速分量的探测

Detection of a second high velocity component in the highly ionized wind from PG 1211+143

Ken Pounds, Andrew Lobban, James Reeves, Simon Vaughan

摘要:

2014年对发光窄线塞弗特星系PG 1211+143的扩展XMM-牛顿观测揭示了一个更复杂的高度电离的高速外流。对铁钾吸收光谱结构的探测发现了高度电离风的第二个外流速度分量,外流速度为v~0.066+/-0.003c,此外还有一个更高的外流速度v~0.129+/-0.002c,与2001年首次观测到的一致。我们注意到,混沌吸积,包括许多逆行和逆行事件,提供了一个有趣的解释的双速风。在这种情况下,持续的外流速度可能与内部吸积流的物理上不同的方向有关,逆吸积产生比逆行吸积更高的发射速度,其比例接近所观察到的。

英文摘要:

An extended XMM-Newton observation of the luminous narrow line Seyfert galaxy PG 1211+143 in 2014 has revealed a more complex highly ionized, high velocity outflow. The detection of previously unresolved spectral structure in Fe K absorption finds a second outflow velocity component of the highly ionized wind, with an outflow velocity of v~0.066+/-0.003c, in addition to a still higher velocity outflow of v~0.129+/-0.002c consistent with that first seen in 2001. We note that chaotic accretion, consisting of many prograde and retrograde events, offers an intriguing explanation of the dual velocity wind. In that context the persisting outflow velocities could relate to physically distinct orientations of the inner accretion flow, with prograde accretion yielding a higher launch velocity than retrograde accretion in a ratio close to that observed.

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