case western reserve university



What dwarf galaxies tell us about galaxy formation and cosmology

Michael Blanton (NYU)

Dwarf galaxies in the field might be the simplest systems we have for testing galaxy formation physics: they are isolated from major recent mergers, they have had very little star-formation and remain mostly gas, and they are all disks with no bulges and small amounts of dust. I discuss their properties using a sample from the SDSS with follow-up 21cm observations. In addition, I use their Tully-Fisher relationship and luminosity function to put quantitative constraints on the mass of the dark matter particle.