标题： 与星系外流和类星体反馈相关的射电喷流的盛行程度 显示英文标题

标题： Prevalence of radio jets associated with galactic outflows and feedback from quasars

摘要： 我们展示了1-7 GHz的高分辨率射电成像（使用VLA和e-MERLIN）以及空间分辨的电离气体动力学研究，对象为十个红移z<0.2的类型2“被遮蔽”的类星体（log [L(AGN)/(erg/s)]>~45），它们具有中等的射电亮度（log [L(1.4GHz)/(W/Hz)]=23.3-24.4）。 这些目标基于宽的[OIII]发射线组分（FWHM~800-1800 km/s）已知存在电离外流。 尽管根据许多传统标准，它们被认为是“射电安静”且不是“射电活动星系核”，但我们显示对于九个目标，恒星形成可能只占射电辐射的<~10%。 我们发现这九个目标中有~80-90%在1-25 kpc尺度上表现出扩展的射电结构。 这些类星体的射电形态、光谱指数及其在射电大小-亮度关系中的位置表明这些源与低功率紧凑型射电星系一致。 因此，我们认为射电喷流主导了大多数这些类星体的射电辐射。 我们观察到的射电喷流与电离气体中形态和动力学上不同的特征相关联，例如湍流增加和外流气泡，揭示了星系尺度上的喷流-气体相互作用。 重要的是，这样的结论无法从当前的低分辨率射电巡天（如FIRST）得出。 我们的观测支持这样一种场景：在类星体阶段，具有适度射电亮度的紧凑型射电喷流是大质量星系的重要反馈机制。 显示英文摘要

摘要： We present 1-7 GHz high-resolution radio imaging (VLA and e-MERLIN) and spatially-resolved ionized gas kinematics for ten z<0.2 type~2 `obscured' quasars (log [L(AGN)/(erg/s)]>~45) with moderate radio luminosities (log [L(1.4GHz)/(W/Hz)]=23.3-24.4). These targets were selected to have known ionized outflows based on broad [OIII] emission-line components (FWHM~800-1800 km/s). Although `radio-quiet' and not `radio AGN' by many traditional criteria, we show that for nine of the targets, star formation likely accounts for <~10 per cent of the radio emission. We find that ~80-90 per cent of these nine targets exhibit extended radio structures on 1-25 kpc scales. The quasars' radio morphologies, spectral indices and position on the radio size-luminosity relationship reveals that these sources are consistent with being low power compact radio galaxies. Therefore, we favour radio jets as dominating the radio emission in the majority of these quasars. The radio jets we observe are associated with morphologically and kinematically distinct features in the ionized gas, such as increased turbulence and outflowing bubbles, revealing jet-gas interaction on galactic scales. Importantly, such conclusions could not have been drawn from current low-resolution radio surveys such as FIRST. Our observations support a scenario where compact radio jets, with modest radio luminosities, are a crucial feedback mechanism for massive galaxies during a quasar phase.