Connecting Galaxies, Halos, and Star Formation Rates Across Cosmic Time

Understand

A simple, observationally-motivated model is presented for understanding how halo masses, galaxy stellar masses, and star formation rates are related, and how these relations evolve with time.

• The relation between halo mass and galaxy stellar mass is determined by matching the observed spatial abundance of galaxies to the expected spatial abundance of halos at multiple epochs -- i.e.
• more massive galaxies are assigned to more massive halos at each epoch.
• Halos at different epochs are connected by halo mass accretion histories estimated from N-body simulations.