Abstract
We have conducted an HI survey with the VLA and the ATCA to search for the gaseous remnants associated with galaxy formation predicted to exist by current models (e.g. Klypin et al., 1999; Colin et al., 2000). We observed 41 extremely isolated, non-peculiar, quiescent galaxies so that any extragalactic gas found should be associated with ongoing galaxy formation and not tidal debris or ejected galactic material. The galaxies, with distances of 21–45 Mpc, were observed with an angular resolution of 1’ (6–13 kpc), velocity resolution of ~5 km/s, a field of view of 30’ (100–200 kpc), and a total bandwidth of 600 km/s. The 3σ HI mass sensitivity of our observations was ~7 × 106 M⊙ over 2 channels.
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