J/MNRAS/328/805 The 2dF QSO Redshift Survey. VIII (Outram+, 2001)
The 2dF QSO Redshift Survey - VIII. Absorption systems in the 10k catalogue.
Outram P.J., Smith R.J., Shanks T., Boyle B.J., Croom S.M., Loaring N.S.,
Miller L.
<Mon. Not. R. Astron. Soc. 328, 805 (2001)>
=2001MNRAS.328..805O 2001MNRAS.328..805O
ADC_Keywords: QSOs ; Surveys ; Spectroscopy
Keywords: surveys - quasars: absorption lines - cosmology: observations -
large-scale structure of Universe
Abstract:
We examine the highest signal-to-noise ratio spectra from the 2dF QSO
Redshift Survey (2QZ) 10k release (Cat. VII/223) and identify over
100 new low-ionization heavy-element absorbers: damped Lyman-α
(DLA) candidates suitable for higher-resolution follow-up
observations. These absorption systems map the spatial distribution of
high-z metals in exactly the same volumes as the foreground 2QZ QSOs
themselves sample and hence the 2QZ gives us the unique opportunity to
compare directly the two tracers of large-scale structure. We examine
the cross-correlation of the two populations to see how they are
relatively clustered, and, by considering the colour of the QSOs,
detect a small amount of dust in these metal systems.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 52 137 Low-ionization 2QZ absorption systems
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See also:
VII/223 : The 2dF QSO Redshift Survey. V. The 10k catalogue (Croom+ 2001)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- 2QZ 2QZ QSO identification
18- 22 F5.2 mag bjmag bj magnitude
24- 28 F5.3 --- zQSO QSO redshift
30- 34 F5.3 --- zabs Absorption redshift
36- 40 F5.2 --- W0 Rest equivalent width of Mg II 2796,2803Å
doublet, unless stated explicitly in n_W0
42 I1 --- n_W0 [3-6]? Ion of the rest equivalent width if
not Mg II (1)
44- 53 A10 --- Ion [a-l] Ion identification (2)
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Note (1): Rest equivalent width from the following lines:
3 = Fe II 2600Å (Mg II blended with sky line)
4 = H I 1215Å
5 = C IV 1548, 1550Å doublet
6 = Mg II 2796Å only
Note (2): Ion identifications are coded as follows:
a = H I
b = C II
c = C IV
d = O I
e = Mg I
f = Mg II
g = Al II
h = Al III
i = Si II
j = Si III
k = Si IV
l = Fe II
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History:
From electronic version of the journal
References:
Boyle et al., Paper I 2000MNRAS.317.1014B 2000MNRAS.317.1014B
Croom et al., Paper II 2001MNRAS.325..483C 2001MNRAS.325..483C
Hoyle et al., Paper IV 2002MNRAS.329..336H 2002MNRAS.329..336H
Croom et al., Paper V 2001MNRAS.322L..29C 2001MNRAS.322L..29C, Cat. VII/223
Outram et al., Paper VI 2001MNRAS.328..174O 2001MNRAS.328..174O
(End) James Marcout, Patricia Bauer [CDS] 31-Jan-2002