Molecular Hydrogen Deficiency in Hi–poor Galaxies and Its Implications for Star Formation


We use a sample of 47 homogeneous and high sensitivity CO images taken from the Nobeyama and BIMA surveys to demonstrate that, contrary to common belief, a significant number (∼ 40%) of HI– deficient nearby spiral galaxies are also depleted in molecular hydrogen. While HI–deficiency by itself is not a sufficient condition for molecular gas depletion, we… (More)


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