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arXiv 1201.1897astro-ph.HE
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射电宁静活动星系核中超快外流的证据:III -位置和能量学

Evidence for ultra-fast outflows in radio-quiet AGNs: III - location and energetics

F. Tombesi, M. Cappi, J. N. Reeves, V. Braito

摘要:

使用先前的X射线光电离模拟的结果蓝移铁K吸收线的42个本地无线电安静AGN观测与XMM-牛顿的样本,在这封信中,我们估计的位置和能量相关的超快外流(不明飞行物)。由于存在显著的不确定性,我们基本上只能设置下限/上限。平均而言,它们的位置在距离中心黑洞约0.0003- 0.03 pc(约10^2-10^4 r_s)的范围内,与吸积盘风/外流的预期一致。质量流出率限制在~0.01-1 M_{\odot} yr^{-1}之间,相当于大于5-10%的吸积率。机械功率的平均下限-上限为log \dot{E}_K ~42.6-44.6 erg s^{-1}。然而,机械功率和测热光度之间的比率的最小可能值被限制为与风/外流引起的反馈模拟所需的最小值相当或更高。因此,这项工作表明,不明飞行物确实能够提供一个显着的贡献,AGN宇宙学反馈,在协议的理论预期和最近的观察AGN流出和星际介质之间的相互作用在几个西弗特星系。

英文摘要:

Using the results of a previous X-ray photo-ionization modelling of blue-shifted Fe K absorption lines on a sample of 42 local radio-quiet AGNs observed with XMM-Newton, in this letter we estimate the location and energetics of the associated ultra-fast outflows (UFOs). Due to significant uncertainties, we are essentially able to place only lower/upper limits. On average, their location is in the interval ~0.0003-0.03pc (~10^2-10^4 r_s) from the central black hole, consistent with what is expected for accretion disk winds/outflows. The mass outflow rates are constrained between ~0.01-1 M_{\odot} yr^{-1}, corresponding to >5-10% of the accretion rates. The average lower-upper limits on the mechanical power are log\dot{E}_K~42.6-44.6 erg s^{-1}. However, the minimum possible value of the ratio between the mechanical power and bolometric luminosity is constrained to be comparable or higher than the minimum required by simulations of feedback induced by winds/outflows. Therefore, this work demonstrates that UFOs are indeed capable to provide a significant contribution to the AGN cosmological feedback, in agreement with theoretical expectations and the recent observation of interactions between AGN outflows and the interstellar medium in several Seyferts galaxies.

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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