Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-03-27
Astronomy and Astrophysics
Astrophysics
12 pages+6 tables, uses emulateapj5. To appear in the Astronomical Journal (July 2001)
Scientific paper
10.1086/321108
We present the results of high spatial resolution HI synthesis observations of six blue compact dwarf (BCD) galaxies. Optically, the selected galaxies have smooth, symmetric isophotes, and thus are the most likely of the BCD class to fade into an object morphologically similar to a dwarf elliptical when the current starburst ends. The neutral gas in all six galaxies appears to be rotationally supported, however, indicating that true morphological transformation from a BCD to a dE will require significant loss of angular momentum. Based on the observed neutral gas dynamics of these and other BCDs, it is unlikely that present-day BCDs will evolve directly into dwarf ellipticals after a starburst phase. We discuss alternative evolutionary scenarios for BCDs and place them within the larger context of galaxy formation and evolution models.
Salzer John Joseph
Skillman Evan D.
van Zee Liese
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