The evolution of Omega(HI) and the epoch of formation of damped Lyman-alpha absorbers

Abstract

We present a study of the evolution of the column density distribution, f(N,z), and total neutral hydrogen mass in high-column density quasar absorbers using candidates from a recent high-redshift survey for damped Lyman-alpha (DLA) and Lyman limit system (LLS) absorbers. The observed number of LLS (N(HI)> 1.6 * 10^{17} atom/cm^2) is used to constrain f(N,z) below the classical DLA Wolfe et al. (1986) definition of 2 * 10^{20} atom/cm^2. The joint LLS-DLA analysis shows unambiguously that f(N,z) deviates significantly from a single power law and that a Gamma-law distribution of the form f(N,z)=(f_*/N_*)(N/N_*)^{-Beta} exp(-N/N_*) provides a better description of the observations. These results are used to determine the amount of neutral gas contained in DLAs and in systems with lower column density. Whilst in the redshift range 2 to 3.5, ~90% of the neutral HI mass is in DLAs, we find that at z>3.5 this fraction drops to only 55% and that the remaining 'missing' mass fraction of the neutral gas lies in sub-DLAs with N(HI) 10^{19} - 2 * 10^{20} atom/cm^2. The characteristic column density, N_*, changes from 1.6 * 10^{21} atom/cm^2 at z<3.5 to 2.9 * 10^{20} atom/cm^2 at z>3.5, supporting a picture where at z>3.5, we are directly observing the formation of high column density neutral hydrogen DLA systems from lower column density units. Moreover since current metallicity studies of DLA systems focus on the higher column density systems they may be giving a biased or incomplete view of global galactic chemical evolution at z>3. After correcting the observed mass in HI for the ``missing'' neutral gas the comoving mass density now shows no evidence for a decrease above z=2. (abridged)

arXiv commentReplaced to match version published in MNRAS. One figure and appendix added, analysis and conclusions unchanged

References in corpus (25)

• The Cosmic Baryon Budget
• A Unified Model for the Evolution of Galaxies and Quasars
• The 2dF Galaxy Redshift Survey: Near Infrared Galaxy Luminosity Functions
• The Nature of High-Redshift Galaxies
• Damped Lyman alpha absorbers at high redshift -- large disks or galactic building blocks?
• A Model of Supernovae Feedback in Galaxy Formation
• Discovery of Damped Lyman-Alpha Systems at Redshifts Less Than 1.65 and Results on their Incidence and Cosmological Mass Density
• Field Galaxy Evolution Since Z~1 from a Sample of QSO Absorption-Selected Galaxies
• The baryon content of the Universe
• Surveys for z > 3 Damped Lyman-alpha Absorption Systems
• The CORALS Survey I: New Estimates of the Number Density and Gas Content of Damped Lyman Alpha Systems Free from Dust Bias
• Evolution of Neutral Gas at High Redshift -- Implications for the Epoch of Galaxy Formation
• Protogalactic Disk Models of Damped Lya Kinematics
• The HST Quasar Absorption Line Key Project. XIV. The Evolution of Ly-alpha Absorption Lines in the Redshift Interval 0 to 1.5
• A Homogeneous Sample of Sub-DLAs I: Construction of the Sample and Chemical Abundance Measurements
• The Hubble Space Telescope Quasar Absorption Line Key Project XIII. A Census of Absorption Line Systems at Low Redshift
• The Lyman-Alpha Forest at 1.5 < z < 4
• APM z>4 QSO Survey: Spectra and Intervening Absorption Systems
• A Homogeneous Sample of Sub-DLAs II: Statistical, Kinematic and Chemical Properties
• Absorption Systems in the Spectra of 66 z > 4 Quasars
• Probing the faint end of the Galaxy luminosity function at z=3 with Ly-alpha emission
• APM z>4 QSO Survey: Distribution and Evolution of High Column Density HI Absorbers
• Galactic Chemical Abundances at z>3 I: First Results from the Echellette Spectrograph and Imager
• Constraints on Models of Galaxy Formation from the Evolution of Damped Ly$\alpha$ Absorption Systems
• Estimating the mass density of neutral gas at $z<1$

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