Other
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mcdg.proc...25g&link_type=abstract
The Magellanic Clouds and Other Dwarf Galaxies, Proceedings of the Bonn/Bochum-Graduiertenkolleg Workshop, held at the Physikzen
Other
General Properties Of Dwarf Galaxies, Irregular Dwarf Galaxies, Origin Of Dwarf Galaxies, Spheroidal Dwarf Galaxies
Scientific paper
The main properties of dwarf galaxies are reviewed, primarily on the basis of optical structures and stellar population characteristics. Morphological distinctions between dwarf and giant galaxies are largely associated with the low central densities of luminous matter in dwarfs, and we investigate the astrophysics of this signature of dwarfs. As dwarfs come in two distinct structural forms, rotating disks in irregulars and dynamically hot spheroids in the dSph/dE family, it is not clear that dwarfs are produced by a single process. Further complications are introduced by results of recent studies showing that structurally similar galaxies have experienced different star formation histories, so it is not clear which factors control evolutionary rates. While we can show that the presence of low mass densities naturally leads to many of the expected features of dI galaxies, the models seem less well-constrained for the spheroidal dwarfs.
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