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The Gaseous Extent of Galaxies and the Origin of Lyα Absorption Systems

  • Conference paper
QSO Absorption Lines

Part of the book series: ESO Astrophysics Symposia ((ESO))

Abstract

We report current results of an imaging and spectroscopic survey of faint galaxies in fields of HST spectroscopic target QSOs. The primary objectives of the survey are to determine the gaseous extent of galaxies and to determine the origin of Lyα absorption systems. The primary results of the survey are that most galaxies are surrounded by extended gaseous envelopes of ≈ 160 h−1 kpc radius and of unit covering factor and that many or most Lyα absorption systems with absorption equivalent widths satisfying W > 0.3 Å arise in extended gaseous envelopes of galaxies. We also report some examples of particular interest, including a group or cluster of Lyα-absorbing galaxies at z = 0.26 and three “dwarf spiral” Lyα-absorbing galaxies at z < 0.1.

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Author information

Authors and Affiliations

  1. SUNY at Stony Brook, NY, 11794-2100, Stony Brook, USA

    Kenneth M. Lanzetta

  2. University of New South Wales, P.O. Box 1, Kensington, NSW, Australia

    John K. Webb

  3. Instituto de Fisica de Cantabria, Facultad de Ciencias, 39005, Santander, Spain

    Xavier Barcons

Authors
  1. Kenneth M. Lanzetta
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  2. John K. Webb
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  3. Xavier Barcons
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Editor information

Editors and Affiliations

  1. European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748, Garching, Germany

    Georges Meylan

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© 1995 Springer-Verlag Berlin Heidelberg

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Lanzetta, K.M., Webb, J.K., Barcons, X. (1995). The Gaseous Extent of Galaxies and the Origin of Lyα Absorption Systems. In: Meylan, G. (eds) QSO Absorption Lines. ESO Astrophysics Symposia. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-49458-4_54

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  • DOI: https://doi.org/10.1007/978-3-540-49458-4_54

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-662-22373-4

  • Online ISBN: 978-3-540-49458-4

  • eBook Packages: Springer Book Archive

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