Published 2002
| Published + Submitted
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Statistical Properties of DLAs and Sub-DLAs
Abstract
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).
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.Attached Files
Published - 2002ASPC__253__501P.pdf
Submitted - 0107125.pdf
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Additional details
- Eprint ID
- 75462
- Resolver ID
- CaltechAUTHORS:20170328-082606430
- Created
-
2017-03-28Created from EPrint's datestamp field
- Updated
-
2023-06-01Created from EPrint's last_modified field
- Caltech groups
- Infrared Processing and Analysis Center (IPAC)
- Series Name
- Astronomical Society of the Pacific Conference Series
- Series Volume or Issue Number
- 253