David Weinberg (OSU) gave a great talk today on galaxy evolution in a cosmological context with an emphasis on disk galaxy formation. He was able to match the properties of the distribution of galaxies in disk size, stellar mass, and rotation velocity with a model with cosmological inputs and some by-hand inputs. He predicts that high surface-brightness disks have a larger mass ratio of disk mass to dark-matter halo mass than low surface-brightness disks. In general, my main concern with these kinds of analyses is that they do not allow the disk properties to be set by late gas accretion (which seems likely to me). However, his model makes testable predictions and we can test them!
I officially posted to the SDSS collaboration the Gunn Atlas of Galaxies project, outlining its main features. I will post more about this soon.
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