• The Evolution of Neutral Gas in the Universe

      Turnshek, David; Rao, Sandhya; Monier, Eric; Nestor, Daniel; Quider, Anna; Cambridge University; The College at Brockport; University of Pittsburgh (2006-01-01)
      We give references to some of our work on the properties and evolution of the neutral gas component of the Universe (see reference list). The bulk of the observed neutral gas has been detected by identifying intervening damped Ly? (DLA) quasar absorption-line systems with N(H) > 2 × 1020 atoms cm ?2. We also present some initial results from a program to identify DLA absorbers near redshift z = 0.5 using Hubble Space Telescope ACS prism spectra