论文标题
垂死的光：Z〜0.405的X射线褪色的冷值
Dying of the Light: An X-ray Fading Cold Quasar at z ~ 0.405
论文作者
论文摘要
冷的类星体是一种罕见的亚种群，观察到可以托管X射线发光的活性银核（AGN），同时还保留了冷气供应，从而加油了高星形的形成速率。这些物体在进化的早期被解释为AGN。我们提出了新的Sofia Hawc+远红外观测，FUV-FIR光度法和光谱谱图，以表征Z〜0.405时冷的类星体中的吸积和恒星形成行为（CQ 4479）。 CQ 4479是一个星空星系，主要是年轻的恒星种群，高气体质量分数约为50-70％。 AGN成分尚未成为FIR发射的主要成分。我们还发现AGN辐射光度亮度随观察方法和AGN区域的函数而变化。最后，我们确定了候选流出特征，证实了冷数类星体具有能量反馈的假设。该对象对AGN反馈的早期阶段进行了有趣的外观，并探究了AGN和冷气体组件共存的罕见阶段。
Cold quasars are a rare subpopulation observed to host unobscured, X-ray luminous active galactic nuclei (AGN) while also retaining a cold gas supply fueling high star formation rates. These objects are interpreted as AGN early in their evolution. We present new SOFIA HAWC+ far-infrared observations, FUV-FIR photometry, and optical spectroscopy to characterize the accretion and star formation behavior in a cold quasar at z ~ 0.405 (CQ 4479). CQ 4479 is a starburst galaxy with a predominantly young stellar population and a high gas mass fraction of ~50-70%. The AGN component has yet to become the dominant component of the FIR emission. We also find AGN bolometric luminosity that varies as a function of observation method and AGN region probed. Finally, we identify a candidate outflow feature corroborating the hypothesis that cold quasars have energetic feedback. This object presents an intriguing look into the early stages of AGN feedback and probes the rare phase where an AGN and cold gaseous component co-exist.
