论文标题
$ z = 6.6 $ quasar主机银河系中的空间分子星际介质
Spatially resolved molecular interstellar medium in a $z=6.6$ quasar host galaxy
论文作者
论文摘要
我们提出了高空间分辨率（0.4英寸，2.2kpc）对CO（6-5），CO（7-6）和[CI]线条和尘埃连续排放的观察结果，在Quasar J0305 $ -3150 $ 3150的主机中，从$ z = 6.6 $的分配[CII]分布[CII]数据的分配量相比，在不同阶段的ISM之间的动力学。在比较CO的径向谱，[CII]和灰尘连续性时，我们发现CO和灰尘连续性表现出相似的空间分布，这两个分布都比[CII]延伸，表明CO和粉尘表明CO和尘埃在同一气体中添加了race of [CII]。 [CII]/CO，[CII]/FAR-INFRARED（FIR），CO/FIR和DUST CONTINUUM $ S_ {98.7 \ rm GHz}/s_ {258.1 \ rm ghz} $比率下降，半径可能会随着半径的增加而表明灰尘深度减小。
We present high spatial resolution (0.4", 2.2kpc) observations of the CO(6-5), CO(7-6) and [CI] lines and dust continuum emission from the interstellar medium in the host galaxy of the quasar J0305$-$3150 at $z=6.6$. These, together with archival [CII] data at comparable spatial resolution, enable studies of the spatial distribution and kinematics between the ISM in different phases. When comparing the radial profiles of CO, [CII] and the dust continuum, we find that the CO and dust continuum exhibit similar spatial distributions, both of which are less extended than the [CII], indicating that the CO and dust continuum are tracing the same gas component, while the [CII] is tracing a more extended one. In addition, we derive the radial profiles of the [CII]/CO, [CII]/far-infrared (FIR), CO/FIR, and dust continuum $S_{98.7 \rm GHz}/S_{258.1 \rm GHz}$ ratios. We find a decreasing $S_{98.7 \rm GHz}/S_{258.1 \rm GHz}$ ratio with radius, possibly indicating a decrease of dust optical depth with increasing radius. We also detect some of the ISM lines and continuum emission in the companion galaxies previously discovered in the field around J0305$-$3150. Through comparing the line-to-line and line-to-FIR ratios, we find no significant differences between the quasar and its companion galaxies.
