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The Evolution and Space Density of Damped Lyman-α Galaxies

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Abstract

The results of a new spectroscopic survey of 66 z ≳4 quasars for Damped Lyman-α absorption systems are presented. The search led to the discovery of 26 new DLA candidates which are analysed in order to compute the comoving mass density of neutral gas in a non-zeroΛ Universe. The possible sources of uncertainty are discussed and the implications of our results for the theories of galaxy formation and evolution are emphasized. A subsequent paper will present details of the calculations summarised here and a more extensive explanation of the consequences of our observations for the understanding of the nature of DLAs.

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Authors and Affiliations

  1. Institute of Astronomy, University of Cambridge, UK

    Céline Péroux

  2. Institute of Astronomy, University of Cambridge, UK

    Mike J. Irwin & Richard G. McMahon

  3. SIRTF Science Center, California Institute of Technology, Pasadena, USA

    Lisa J. Storrie-Lombardi

Authors
  1. Céline Péroux
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  2. Mike J. Irwin
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  3. Richard G. McMahon
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  4. Lisa J. Storrie-Lombardi
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Péroux, C., Irwin, M.J., McMahon, R.G. et al. The Evolution and Space Density of Damped Lyman-α Galaxies. Astrophysics and Space Science 277 (Suppl 1), 551–554 (2001). https://doi.org/10.1023/A:1012747805817

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  • DOI: https://doi.org/10.1023/A:1012747805817

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