J/MNRAS/462/2980 BOSS narrow CIV absorption lines. III. (Chen+, 2016)
Narrow C IV absorption doublets on quasar spectra of the
Baryon Oscillation Spectroscopic Survey.
Chen Z.-F., Gu Q.-S., Zhou L., Chen Y.-M.
<Mon. Not. R. Astron. Soc., 462, 2980-2989 (2016)>
=2016MNRAS.462.2980C 2016MNRAS.462.2980C (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; QSOs ; Redshifts ; Equivalent widths
Keywords: galaxies: active - quasars: absorption lines - quasars: general
Abstract:
In this paper, we extend our work of IV λλ1548,1551
narrow absorption lines (NALs) with zabs≪zem on quasar spectra of
the Baryon Oscillation Spectroscopic Survey (BOSS) to collect CIV NALs
with zabs≤zem from blue to red wings of CIV λ1549 emission
lines. Together with IV NALs with 1.4544≤zabs≤4.9224 in surveyed
spectral region redward of Lyα until red wing of CIV
λ1549 emission line. We find that the stronger CIV NALs tend to
be the more saturated absorptions, and associated systems
(zabs~=zem) seem to have larger absorption strengths when compared
to intervening ones (zabs≪zem). The redshift density evolution
behaviour of absorbers (the number of absorbers per redshift path) is
similar to the history of the cosmic star formation. When compared to
the quasar-frame velocity (β) distribution of MgII absorbers, the
β distribution of CIV absorbers is broader at β~=0, shows
longer extended tail, and exhibits a larger dispersion for
environmental absorptions. In addition, for associated CIV absorbers,
we find that low-luminosity quasars seem to exhibit smaller β and
stronger absorptions when compared to high-luminosity quasars.
Description:
In this paper, we extend our previous search of CIV NALs released in
Papers I (Chen et al., 2014, Cat. J/ApJS/210/7) and II (Chen et al.,
2014, Cat. J/ApJS/215/12) to spectral data redwards of CIV 1549
emission lines. Therefore, the quasar sample and selection criteria
are the combination of Papers I (Chen et al., 2014, Cat. J/ApJS/210/7)
and II (Chen et al., 2014, Cat. J/ApJS/215/12).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 93 41479 Catalog of CIV narrow absorption line systems
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See also:
J/ApJS/210/7 : BOSS narrow CIV absorption lines. I. zem≤2.4 (Chen+, 2014)
J/ApJS/215/12 : BOSS narrow CIV absorption lines. II. zem>2.4 (Chen+, 2014)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- SDSS SDSS designation (HHMMSS.ss+DDMMSS.s)
20- 23 I4 --- Plate DESS plate number
25- 29 I5 d MJD SDSS MJD number
31- 34 I4 --- Fiber SDSS fiber number
36- 41 F6.4 --- zem Emission redshift
43- 48 F6.4 --- zabs Absorption redshift
50- 54 F5.2 0.1nm EW1548 CIV λ1548 equivalent width at rest frame
57- 60 F4.2 0.1nm e_EW1548 rms uncertainty on EW1548
63- 66 F4.2 0.1nm EW1551 CIV λ1551 equivalent width at rest frame
69- 72 F4.2 0.1nm e_EW1551 rms uncertainty on EW1551
74- 78 F5.2 --- SL1548 Significant level of absorption line
CIV λ1548
80- 84 F5.2 --- SL1551 Significant level of absorption line
CIV λ1551
86- 93 F8.5 --- beta beta value (1)
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Note (1): beta=v/c=((1+zem)2-(1+zabs)2))/((1+zem)2+(1+zabs)2))
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History:
From electronic version of the journal
References:
Chen et al., Paper I 2014ApJS..210....7C 2014ApJS..210....7C, Cat. J/ApJS/210/7
Chen et al., Paper II 2014ApJS..215...12C 2014ApJS..215...12C, Cat. J/ApJS/215/12
(End) Patricia Vannier [CDS] 15-Mar-2018