New Probes with Deep of Gas Flows within Galaxies at Intermediate Redshifts

¹ UCO/Lick Obs., Department of Astronomy & Astrophysics, University of California, Santa Cruz, CA 95064, USA

Abstract

Instead of using background QSO’s, we suggest using the light from galaxies to probe cool gas flows within their own halos. We highlight two DEEP projects based on this idea, one by Sato et al. (2009) that uses NaD absorption lines of galaxies at low redshifts z < 0.6 and another by Weiner et al. (2009) that uses MgII lines seen in galaxies at higher redshifts z ∼ 1.4.