Computer Science
Scientific paper
Nov 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ycat..21300177r&link_type=abstract
VizieR On-line Data Catalog: J/ApJS/130/177. Originally published in: 2000ApJS..130..177R
Computer Science
Galaxies: Radio, H I Data, Radio Lines, Radial Velocities
Scientific paper
The Arecibo Dual-Beam Survey is a "blind" 21 cm search for galaxies covering ~430deg2 of sky. We present the data from the detection survey as well as from the follow-up observations to confirm detections and improve positions and flux measurements. We find 265 galaxies, many of which are extremely low surface brightness. Some of these previously uncatalogued galaxies lie within the zone of avoidance, where they are obscured by the gas and dust in our Galaxy. Eighty-one of these sources are not previously catalogued optically, and there are 11 galaxies that have no associated optical counterpart or are only tentatively associated with faint wisps of nebulosity on the Digitized Sky Survey images. We discuss the properties of the survey, and in particular we make direct determinations of the completeness and reliability of the sample. The behavior of the completeness and its dependencies is essential for determining the H I mass function. We leave the discussion of the mass function for a later paper, but do note that we find many low surface brightness galaxies and seven sources with MHI<108M{sun}.
(3 data files).
Rosenberg Jessica L.
Schneider Stephen E.
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