TAP Colloquium

Monday, Jan 14, 2013
4:00 pm
Location: Steward Observatory
Room: N210

Dr. Peter Behroozi
Stanford University

"Galaxy Star Formation Efficiency from z=0 to z=8"

We present a robust, self-consistent, semi-empirical model which matches observed galaxy stellar masses and star formation rates over nearly all of 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 the implications of this latter finding, especially in terms of the impact on black hole/supernova feedback models and the impact on the shape of the cosmic star formation rate for 0 < z < 8.

Host: Desika Narayanan

TAP Colloquia