Observational signatures of galactic winds powered by active galactic nuclei
Observational signatures of galactic winds powered by active galactic nuclei
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DOI：
10.1093/mnras/stu2648
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发表时间：
2014-08
影响因子：
4.8
通讯作者：
Jesse Nims;E. Quataert;C. Faucher-Giguère
中科院分区：
文献类型：
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作者：
Jesse Nims;E. Quataert;C. Faucher-Giguère
我们预测了由活动星系核(AGN)提供动力的星系尺度外流的观测特征。大部分发射是由进入周围星际介质(ISM)的正激波产生的，而不是由反向激波产生的。由现象学反馈论证提出的具有能量的AgN驱动的银河系风应该产生10^(41-44)erg/S的空间扩展的1-10keV X射线辐射，远远超过正常恒星形成星系的空间扩展X射线辐射。这种发射的存在是对活动星系核外流是否与其所在星系的ISM显著相互作用的直接测试。我们进一步表明，即使是射电安静的类星体，其射电光度也应该与正常恒星形成星系的远红外-射电关联相当或超过。这种射电辐射直接限制了活动星系核驱动的银河系风中的总动能通量。来自活动星系核风激的射电辐射也可以解释最近在射电安静类星体中射电光度与活动星系核窄线区域运动学之间的关系。
We predict the observational signatures of galaxy scale outflows powered by active galactic nuclei (AGN). Most of the emission is produced by the forward shock driven into the ambient interstellar medium (ISM) rather than by the reverse shock. AGN powered galactic winds with energetics suggested by phenomenological feedback arguments should produce spatially extended 1-10 keV X-ray emission of 10^(41-44) erg/s, significantly in excess of the spatially extended X-ray emission associated with normal star forming galaxies. The presence of such emission is a direct test of whether AGN outflows significantly interact with the ISM of their host galaxy. We further show that even radio quiet quasars should have a radio luminosity comparable to or in excess of the far infrared-radio correlation of normal star forming galaxies. This radio emission directly constrains the total kinetic energy flux in AGN-powered galactic winds. Radio emission from AGN wind shocks can also explain the recently highlighted correlations between radio luminosity and the kinematics of AGN narrow-line regions in radio quiet quasars.