APEC Seminar (Astronomy - Particle Physics - Experimental Physics - Cosmology)

Speaker: Peter Behroozi (Space Telescope Science Institute)
Title: Galaxy Formation in Dark Matter Halos from z=15 to z=0
Date (JST): Thu, Dec 03, 2015, 13:30 - 14:30
Place: Seminar Room A
Related File: 1578.pdf
Abstract: We present a robust, self-consistent, semi-empirical model which matches observed galaxy stellar masses and star formation rates over nearly all of observed cosmic history. Key results include constraints on star formation rates as a function of halo mass, average star formation histories for galaxies from z=0 to z=8, and the buildup of the intracluster light as a function of halo mass and time.
We also examine the connections between halo growth and galaxy growth, and we find that the universe's star formation history since z~4 can be explained by a star formation efficiency which is strongly dependent on mass but only weakly dependent on time. We discuss how it is possible to physically extend the connection between galaxies and halos to very high redshifts, allowing predictions for what the James Webb Space Telescope will be able to see out to z=15.