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Paper: High-Resolution CO Imaging of High-Redshift QSO Host Galaxies
Volume: 375, From Z-Machines to ALMA: (Sub)Millimeter Spectroscopy of Galaxies
Page: 182
Authors: Walter, F.; Riechers, D.A.; Carilli, C.L.; Bertoldi, F.; Weiss, A.; Cox, P.
Abstract: We review recent high-resolution CO observations of distant QSOs obtained at the Very Large Array. The aim of these observations is to resolve the molecular gas distributions in these extreme objects both spatially and in velocity space. They provide unique information regarding the small-scale distribution, the extent, and the brightness temperatures of the molecular gas in these early systems. The structure and dynamics of the molecular gas may reveal whether or not mergers can be the cause of the ongoing starburst activity. The observations also allow for a first estimate of the dynamical mass. Currently, only the VLA is able to obtain resolutions in CO of up to 0.15″, which are needed to resolve typical galactic structures of sizes ∼ 1 kpc. We present new high-resolution VLA imaging of high-z QSOs (BRI1335−0417, APM08279+5255, and J1148+5251). These observations pave the road to future ALMA observations, where resolutions of order 0.1″ will be obtained routinely.
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