April 27, 2000 CfA Colloquium


Title: Low Surface Brightness Galaxies: 15 Years of Discovery

Speaker: Greg Bothun

Abstract: The idea that the detectability of galaxies was compromised by our terrestrial observing environment was first quantified by Mike Disney in 1976 but was certainly qualitatively understood by Messier. For many years, this idea was dismissed by the extragalactic community. Starting in 1984 our group begin to pursue this notion in earnest. This talk will describe the last 15 years of activity that have seen low surface brightness galaxies evolve from an idiosyncratic notion that couldn't be correct to the state where there is now a strong plausibility argument that they contain essentially all the baryons. Along the way, we have discovered several engimatic individual galaxies which strongly challange our ideas of galaxy formation and evolution as well as the star formation histories of galaxies.

Reference for students: Modern Cosmological Observations and Problems by Greg Bothun
Lunch on Friday 4/28 at 12:00 pm in Phillips