arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1012.0998astro-ph.CO
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塞弗特星系NGC 4051的扩展XMM-牛顿观测。I.有证据表明

An extended XMM-Newton observation of the Seyfert galaxy NGC 4051. I. Evidence for a shocked outflow

K. A. Pounds, S. Vaughan

摘要:

对Seyfert 1星系NGC 4051的扩展XMM-牛顿观测揭示了一个丰富的吸收线光谱,表明存在一个具有宽范围速度和电离参数的光电离外流。在低连续通量的发射线光谱是很好地定义与几个丰富的金属离子的窄和宽的组件。的吸收线速度结构和广泛的相关性的速度和电离参数是一致的外流的情况下,高度电离,高速风,可能在间歇性的超爱丁顿吸积,运行到星际介质或以前的喷出物,失去了大部分的动能在由此产生的强冲击。我们探讨的可能性,准恒定的软X射线发射组件可能是这种冲击后冷却的证据。这一修正后的活动星系核外流的观点与多个小爱丁顿吸积事件相一致,这些事件创造了一个动量驱动的反馈,将黑洞和宿主星系的增长联系起来。

英文摘要:

An extended XMM-Newton observation of the Seyfert 1 galaxy NGC 4051 has revealed a rich absorption line spectrum indicating the presence of a photoionized outflow with a wide range of velocities and ionization parameter. At low continuum fluxes an emission line spectrum is well defined with both narrow and broad components of several abundant metal ions. The absorption line velocity structure and a broad correlation of velocity and ionization parameter are consistent with an outflow scenario where a highly ionized, high velocity wind, perhaps launched during intermittent super-Eddington accretion, runs into the interstellar medium or previous ejecta, losing much of its kinetic energy in the resultant strong shock. We explore the possibility that a quasi-constant soft X-ray emission component may be evidence of this post-shock cooling. This revised view of AGN outflows is consistent with multiple minor Eddington accretion episodes creating a momentum-driven feedback linking black hole and host galaxy growth.

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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