| Abstract | Observations of H I emission from galaxies containing QSOs and active nuclei, obtained with the Arecibo telescope, are reported, including new data on 17 objects, new detections in four of them, improved profiles in five more, and possible detections in several others. These results are discussed together with published observations of five other objects by the same telescope. This sample lies at higher luminosity and redshift than surveys of Seyfert galaxies. The line profiles are generally broad and asymmetric, probably due to contamination by associated or interacting galaxies. There is a close agreement with optical NLR redshifts, but a mismatch of some 50 km/s is suggested. Overall, the H I masses are lower than for normal galaxies, but they appear to correlate with the nuclear luminosity. This may connect fueling events and ionization by the nuclear radiation. |
