Other
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20919903b&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #199.03; Bulletin of the American Astronomical Society,
Other
Scientific paper
Most theories of galaxy formation incorporate elements like supernova feedback, ram pressure stripping, and other poorly understood physical effects. Dwarf galaxies, with their shallow potential wells, are the galaxies most sensitive to these processes. Thus, the study of dwarf galaxies may lead to a better understanding of these effects. Using the Sloan Digital Sky Survey, I examine the properties of dwarf satellites of luminous galaxies. By deprojecting the distribution, I determine the three-dimensional radial distribution of satellites around host galaxies. Treating blue (dIrr) and red (dE or dSph) satellites separately, I demonstrate that the trend seen in the Milky Way, that nearby dwarfs are much redder, also holds for other systems. Our results suggest that interaction with a large host is the only process which can end star-formation in dwarfs. I compare these results to theoretical predictions based on semianalytic models.
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