Wind from the black-hole accretion disk driving a molecular outflow in an active galaxy
Wind from the black-hole accretion disk driving a molecular outflow in an active galaxy
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DOI：
10.1038/nature14261
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发表时间：
2015-01
期刊：
影响因子：
64.8
通讯作者：
F. Tombesi;M. Meléndez;S. Veilleux;J. Reeves;E. González-Alfonso;C. S. R. Nasagsfccresst;U. Maryland-U.-Mary
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文献类型：
--
作者：
F. Tombesi;M. Meléndez;S. Veilleux;J. Reeves;E. González-Alfonso;C. S. R. Nasagsfccresst;U. Maryland-U.-Mary
人们通常认为，由活跃星系核驱动的强大风会影响超大质量黑洞及其宿主星系的演化，从而抑制恒星形成并解释黑洞与星系之间的密切关系。最近对超亮红外星系中大规模分子流出的观测支持了这种类星体反馈的想法，因为它们直接追踪了恒星形成的气体。理论模型表明，这些外流源自快速吸积盘风驱动的能量守恒流。超亮星系中大规模分子流出与吸积盘活动之间的拟议联系是不完整的,,,,,因为没有检测到吸积盘风。相反，迄今为止，对强大吸积盘风的研究仅集中于对当地塞弗特星系和一些红移较高的类星体的 X 射线观测。在这里，我们报告了在 IRAS F11119+3257 的 X 射线光谱中对强大的吸积盘风的观察，该吸积盘风具有温和的相对论速度（光速的四分之一），IRAS F11119+3257 是附近的一个（红移 0.189）光学分类的 1 型超光红外星系，拥有强大的分子外流。活跃星系核负责大约 80% 的发射，类星体的光度为每秒 1.5 × 1046 尔格。这两种类型的广角流出的能量学与能量守恒机制一致，即缺乏强大射电喷流的活动星系核中类星体反馈的基础（此类喷流是驱动分子流出的另一种方式）。
Powerful winds driven by active galactic nuclei are often thought to affect the evolution of both supermassive black holes and their host galaxies, quenching star formation and explaining the close relationship between black holes and galaxies,. Recent observations of large-scale molecular outflows,,,,,in ultraluminous infrared galaxies support this quasar-feedback idea, because they directly trace the gas from which stars form. Theoretical models,,,suggest that these outflows originate as energy-conserving flows driven by fast accretion-disk winds. Proposed connections between large-scale molecular outflows and accretion-disk activity in ultraluminous galaxies were incomplete,,,,,because no accretion-disk wind had been detected. Conversely, studies of powerful accretion-disk winds have until now focused only on X-ray observations of local Seyfert galaxies,and a few higher-redshift quasars,,,,. Here we report observations of a powerful accretion-disk wind with a mildly relativistic velocity (a quarter that of light) in the X-ray spectrum of IRAS F11119+3257, a nearby (redshift 0.189) optically classified type 1 ultraluminous infrared galaxy hosting a powerful molecular outflow. The active galactic nucleus is responsible for about 80 per cent of the emission, with a quasar-like luminosity of 1.5 × 1046ergs per second. The energetics of these two types of wide-angle outflows is consistent with the energy-conserving mechanism,,,that is the basis of the quasar feedback in active galactic nuclei that lack powerful radio jets (such jets are an alternative way to drive molecular outflows).