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Statistical Properties of DLAs and Sub-DLAs

Péroux, Céline and Irwin, Mike J. and McMahon, Richard G. and Storrie-Lombardi, Lisa J. (2002) Statistical Properties of DLAs and Sub-DLAs. In: Chemical enrichment of intracluster and intergalactic medium. Astronomical Society of the Pacific Conference Series. No.253. Astronomical Society of the Pacific , San Francisco, CA, pp. 501-506. ISBN 1-58381-093-5.

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Quasar absorbers provide a powerful observational tool with which to probe both galaxies and the intergalactic medium up to high redshift. 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 data from a recent high-redshift survey for damped Lyman-α (DLA) and Lyman limit system (LLS) absorbers. 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 x 10^20 cm^(-2).

Item Type:Book Section
Related URLs:
URLURL TypeDescription Paper
Péroux, Céline0000-0002-4288-599X
Storrie-Lombardi, Lisa J.0000-0002-5987-5210
Additional Information:© 2002 Astronomical Society of the Pacific. Provided by the NASA Astrophysics Data System. CP would like to thank the organising committee for putting together a very enjoyable meeting.
Group:Infrared Processing and Analysis Center (IPAC)
Series Name:Astronomical Society of the Pacific Conference Series
Issue or Number:253
Record Number:CaltechAUTHORS:20170328-082606430
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75462
Deposited By: Tony Diaz
Deposited On:28 Mar 2017 15:49
Last Modified:09 Mar 2020 13:19

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