Galaxy Populations and Evolution in Clusters Iv: Deep Hi Observations of Dwarf Ellipticals in the Virgo Cluster


We present in this paper the deepest Arecibo HI observations of Virgo cluster dwarf ellipticals (dEs) taken to date. Based on this data we argue that a significant fraction of Virgo cluster dEs recently underwent evolution. Our new observations consist of HI 21-cm line observations for 22 classified dE galaxies with optical radial velocities consistent with… (More)


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