March 2

Ari Maller (CUNY)

Cold Flow Disks and Gas Halos Around Galaxies

Clues to how galaxies are assembled can be found in their gaseous halos.  Absorption systems give us a way to probe galaxy gaseous halos and thus constrain models of galaxy formation.  High-resolution hydrodynamical simulations show that during cold mode accretion a cold flow disk builds up around galaxies.  The cold flow disk can be studied with absorption systems that already give some evidence for its existence.  Future observations will be able to show which galaxies are experiencing cold mode accretion and directly measure the inflow of gas and angular momentum onto those galaxies.