论文标题
大约$ \ mathbf {z \ sim2.3} $的延长冷分子气和尘埃晕的证据
Evidence of extended cold molecular gas and dust halos around $\mathbf{z\sim2.3}$ Extremely Red Quasars with ALMA
论文作者
论文摘要
据信大规模流出是星系发展的重要机制。我们可以通过研究当前的星系流出及其在星系中的影响或研究过去流出对银河系周围气体的影响来确定这些流出的影响。在这项工作中，我们检查了Co（7-6），[Ci] \，（$ ^{3} \ rm P_ {1} \ rightArow {\ rm ^3 p} _ {0} $），h $ _2 $ _2 $ _2 $ o 2 $ _ 2 $ _ {11} $ _ {11} $ - 2 $ _ {02 $ _ {02} $ {02} $ {02} $ {02} $ {02} $ {02} $ {02} z $ \ sim $ 2.3使用阿尔玛。通过研究单个来源和堆叠发射的径向表面亮度曲线，我们在CO（7-6），[CI]（2-1）和尘埃连续体的$ \ sim $ 14 kpc上检测到延长的冷气和灰尘发射。这是第一次使用[CI]延长发射在类星体宿主星系周围周围的大型圆环中等尺度上检测到大量分子气体的存在。我们估计，这些光环的灰尘和分子气体质量为10 $^{7.6} $和10 $^{10.6} $ M $ _ \ odot $，表明在这些极端类星体周围的大量灰尘和分子气库。通过估计这种气体可以通过分子气体流出（7-32 MYR）达到这些距离的时间尺度，我们得出结论，这些光环是过去AGN或Starburst活性的遗物，而不是当前极端类验活动的效果。
Large-scale outflows are believed to be an important mechanism in the evolution of galaxies. We can determine the impact of these outflows by studying either current galaxy outflows and their effect in the galaxy or by studying the effect of past outflows on the gas surrounding the galaxy. In this work, we examine the CO(7-6), [CI]\,($^{3} \rm P_{1} \rightarrow {\rm ^3 P}_{0}$), H$_2$O 2$_{11}$--2$_{02}$ and dust continuum emission of 15 extremely red quasars (ERQs) at z$\sim$2.3 using ALMA. By investigating the radial surface brightness profiles of both the individual sources and the stacked emission, we detect extended cold gas and dust emission on scales of $\sim$14 kpc in CO(7-6), [CI](2-1), and dust continuum. This is the first time that the presence of a large amount of molecular gas was detected on large, circum-galactic medium scales around quasar host galaxies using [CI] extended emission. We estimate the dust and molecular gas mass of these halos to be 10$^{7.6}$ and 10$^{10.6}$ M$_\odot$, indicating significant dust and molecular gas reservoirs around these extreme quasars. By estimating the timescale at which this gas can reach these distances by molecular gas outflows (7-32 Myr), we conclude that these halos are a relic of past AGN or starburst activity, rather than an effect of the current episode of extreme quasar activity.
