Milky Way substructure

Willman told us in group meeting about all the newly discovered Milky Way substructure, including four new ultra-faint dwarfs. In all, about seven dwarfs have been discovered in the seventh of the sky covered by SDSS imaging so far, so we expect many tens of new dwarfs once we have good imaging all-sky. Substructure problem (ie, the problem that the simulations of Milky-Way-like galaxies put many more dwarfs in the halo than we have observed): be gone! After group meeting, Willman, Zolotov, and I discussed possible projects to find yet more substructure in the near term.