Back to Volume
Paper: Blue compact dwarf galaxies in Virgo and nearby groups
Volume: 10, Evolution of the Universe of Galaxies: Edwin Hubble Centennial Symposium
Page: 67
Authors: Hoffman, G. L.; Salpeter, E. E.; Helou, George
Abstract: Results of a neutral hydrogen (HI) survey of blue compact dwarf (BCD) galaxies in the Virgo Cluster area and some nearby groups of galaxies are presented. The BCDs are comparable to other dwarf irregular galaxies in rotation speed, blue and HI luminosities, but are sigificantly smaller in diameter. The dearth of protogalactic HI clouds with no accompanying stellar luminosity leads to the conclusion that the BCDs, for the most part, must have experienced star formation prior to the current burst. The distribution of the BCDs among the subclusters within Virgo and among groups further out in the supercluster is not uniform; typically 10 percent of all dwarf irregulars are BCDs, but in two special clouds the fraction of BCDs is more than twice as high.
Back to Volume