Physics
Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1035..186c&link_type=abstract
THE EVOLUTION OF GALAXIES THROUGH THE NEUTRAL HYDROGEN WINDOW. AIP Conference Proceedings, Volume 1035, pp. 186-189 (2008).
Physics
1
Radio Telescopes And Instrumentation, Heterodyne Receivers, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, Hi Regions And 21-Cm Lines, Diffuse, Translucent, And High-Velocity Clouds, Galaxy Clusters, Spectroscopy And Spectrophotometry
Scientific paper
We present results from a targeted survey undertaken with the 305m Arecibo radiotelescope to detect HI-line emission from disk galaxies at redshift z>0.16. The targets for the observations, selected from the Sloan Digital Sky Survey database, are non-interacting disk galaxies in relatively isolated fields. HI profiles of adequate quality for flux and velocity width measurement were obtained for ~30 galaxies in the redshift range 0.17-0.26 (i.e. 2-3 Gyr lookback time). The HI masses of these objects are 3-8×1010 Msolar. Our results prove, for the first time, the feasibility of single-dish HI observations above redshift z = 0.2. In particular, this sample includes the highest redshift detections of HI emission from individual galaxies to date.
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