论文标题
在z = 6处的强透明亚曲线星系中温暖和致密的分子气的中心浓度
Central concentration of warm and dense molecular gas in a strongly lensed submillimeter galaxy at z=6
论文作者
论文摘要
我们报告了对G09-83808（或H-ATLAS J090045.4+004125）的CO（12-11）线发射的检测，这是一个强烈慢的亚曲线系，即$ z = 6.02 $，带有Atacama大米计/亚毫米/毫米阵列。结合先前检测到的[O III] $ \，88 \：\ MATHRM {μm} $，[n ii] $ \，205 \：\ MATHRM {μm{μm} $，以及0.6 $ \：$ mm和1.5 $ \ \：$ mm \：$ mm的duck Continuum，我们调查了多个媒介的物理属性38。源平面重建表明，CO（12-11）发射的区域是紧凑的（$ R_ \ Mathrm {E，Co} = 0.49^{+0.29} _ { - 0.19} \，\ Mathrm {KPC} $），并且与dust continuum conconum concosconcosecons CO光谱线能分布的非本地热力学平衡辐射转移模型表明，大多数CO（12-11）发射来自温暖（$ t _ {\ Mathrm {kin}}} = 320 \ pm170 \：$ k）和密集的温度温度（$ \ log（n _ {\ mathrm {h2}}}/\ mathrm {cm^{ - 3}}）= 5.4 \ pm0.6 $）气体，表明温暖而密集的分子气集中在中央0.5 kpc区域中。 G09-83808中的发光比估计为$ L_ \ MATHRM {CO（12-11）} / L_ \ MATHRM {CO（6-5）} = 1.1 \ PM0.2 $。高比例与局部活性银河核（AGN）和$ 6 <z <7 $ quasars的比例一致，事实表明，G09-83808将是探索抗粉尘的AGN的好目标。在重建的[O III] $ \，88 \：\ MATHRM {μm} $和[n ii] $ \，205 \：\ MATHRM {μm} $ cubes中，我们还发现单调速度梯度在核心速度范围内被两个和该构成的因子占据了两种因素，并且是两个和该分数的因子。明亮的[C II] $ \，158 \：\ MATHRM {μm} $线排放的高分辨率观察将使我们能够表征可能旋转磁盘的运动学和子组件的性质。
We report the detection of the CO(12-11) line emission toward G09-83808 (or H-ATLAS J090045.4+004125), a strongly-lensed submillimeter galaxy at $z = 6.02$, with Atacama Large Millimeter/submillimeter Array observations. Combining previously detected [O III]$\,88\:\mathrm{μm}$, [N II]$\,205\:\mathrm{μm}$, and dust continuum at 0.6$\:$mm and 1.5$\:$mm, we investigate the physical properties of the multi-phase interstellar medium in G09-83808. A source-plane reconstruction reveals that the region of the CO(12-11) emission is compact ($R_\mathrm{e, CO}=0.49^{+0.29}_{-0.19}\,\mathrm{kpc}$) and roughly coincides with that of the dust continuum. Non-local thermodynamic equilibrium radiative transfer modeling of CO spectral-line energy distribution reveals that most of the CO(12-11) emission comes from a warm (kinetic temperature of $T_{\mathrm{kin}}=320\pm170\:$K) and dense ($\log(n_{\mathrm{H2}}/\mathrm{cm^{-3}})=5.4\pm0.6$) gas, indicating that the warm and dense molecular gas is concentrated in the central 0.5-kpc region. The luminosity ratio in G09-83808 is estimated to be $L_\mathrm{CO(12-11)} / L_\mathrm{CO(6-5)}=1.1\pm0.2$. The high ratio is consistent with those in local active galactic nuclei (AGNs) and $6<z<7$ quasars, the fact of which implies that G09-83808 would be a good target to explore dust-obscured AGNs in the epoch of reionization. In the reconstructed [O III]$\,88\:\mathrm{μm}$ and [N II]$\,205\:\mathrm{μm}$ cubes, we also find that a monotonic velocity gradient is extending over the central starburst region by a factor of two and that star-forming sub-components exist. High-resolution observations of bright [C II]$\,158\:\mathrm{μm}$ line emissions will enable us to characterize the kinematics of a possible rotating disk and the nature of the sub-components.
