J/MNRAS/346/1103 Redshifts of damped Lymanα absorbers (Peroux+, 2003)
The evolution of Ω(HI) and the epoch of formation of damped Lymanα
absorbers.
Peroux C., Mcmahon R.G., Storrie-lombardi L.J., Irwin M.J.
<Mon. Not. R. Astron. Soc., 346, 1103-1115 (2003)>
=2003MNRAS.346.1103P 2003MNRAS.346.1103P
ADC_Keywords: QSOs ; Redshifts ; H I data
Keywords: galaxies: evolution - galaxies: formation - intergalactic medium -
quasars: absorption lines - cosmology: observations
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 Lymanα (DLA) and Lyman-limit system (LLS)
absorbers.
Description:
Our new sample of high-redshift Lyman-limit systems (Peroux et al.,
2001AJ....121.1799P 2001AJ....121.1799P) is combined with data collected from previous
surveys (Storrie-Lombardi et al., 1994ApJ...427L..13S 1994ApJ...427L..13S) in order to
determine the number of Lyman-limit system LLS per unit redshift.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 68 713 Quasars with confirmed/candidate damped Lymanα
(DLAs, TableA1) and without DLAs detected (TableB1)
refs.dat 78 26 References
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See also:
J/A+A/316/123 : QSO absorber and galaxy evolution (Lindner+ 1996)
J/ApJ/508/200 : QSO low-z Lyα absorbers (Tripp+, 1999)
J/ApJ/524/536 : Nearby Lyα quasar absorbers (Impey+, 1999)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1 A1 --- DLA [A] for confirmed DLA (table1a)
3- 19 A17 --- Quasar Quasar designation
22- 27 F6.4 --- zem ? Emission redshift
30- 35 F6.4 --- zmin ? Minimum value of emission redshift
38- 43 F6.4 --- zmax ? Maximum value of emission redshift
46- 51 F6.4 --- zabs ? Absorption redshift
54- 58 F5.2 [cm-2] logN(HI) ? HI column density
60- 68 A9 --- r_zem References for redshifts, in refs.dat file
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref Reference number
4- 22 A19 --- BibCode BibCode
24- 49 A26 --- Aut Author's name
52- 81 A30 --- Com Comments
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History:
* 12-Jan-2004: From electronic version of the journal
* 17-Dec-2004: Names corrected in table1.dat
(End) James Marcout, Patricia Vannier [CDS] 12-Jan-2004