Spatially Resolved Molecular Interstellar Medium in a z = 6.6 Quasar Host Galaxy

Abstract We present high spatial resolution (?0.?4, 2.2 kpc) observations of the CO(6?5), CO(7?6), and [C i ] 369 ? m lines dust continuum emission from interstellar medium (ISM) in host galaxy quasar J0305?3150 at z = 6.6. These, together with archival ii 158 data a comparable resolution, enable studies distribution kinematics between ISM different phases. When comparing radial profiles CO, , continuum, we find that CO exhibit similar distributions, both which are less extended than indicating tracing same gas component, while ]158 is more one. In addition, derive /CO, /far-infrared (FIR), CO/FIR, S 98.7 GHz / 258.1 ratios. decreasing ratio radius, possibly decrease optical depth increasing radius. also detect some companion galaxies previously discovered field around J0305?3150. Through line-to-line line-to-FIR ratios, no significant differences its galaxies.