SIMBAD references

2014ApJS..215...12C - Astrophys. J., Suppl. Ser., 215, 12 (2014/November-0)

Catalog of narrow C IV absorption lines in BOSS. II. For quasars with zem> 2.4.

CHEN Z.-F., QIN Y.-P., QIN M., PAN C.-J. and PAN D.-S.

Abstract (from CDS):

As the second work in a series of papers aiming to detect absorption systems in the quasar spectra of the Baryon Oscillation Spectroscopic Survey, we continue the analysis of Paper I by expanding the quasar sample to those quasars with zem> 2.4. This yields a sample of 21,963 appropriate quasars to search for narrow C IV λλ1548, 1551 absorptions with Wr ≥ 0.2 Å for both lines. There are 9708 quasars with at least one appropriate absorption system imprinted on their spectra. From these spectra, we detect 13,919 narrow C IV absorption systems whose absorption redshifts cover a range of zabs= 1.8784-4.3704. In this paper and Paper I, we have selected 37,241 appropriate quasars with median S/N ≥ 4 and 1.54 ≲ zem ≲ 5.16 to visually analyze narrow C IV λλ1548, 1551 absorption doublets one by one. A total of 15,999 quasars are found to have at least one appropriate absorption system imprinted on their spectra. From these 15,999 quasar spectra, we have detected 23,336 appropriate C IV λλ1548, 1551 absorption systems with Wr ≥ 0.2 Å whose absorption redshifts cover a range of zabs= 1.4544-4.3704. The largest values of Wr are 3.19 Å for the λ1548 absorption line and 2.93 Å for the λ1551 absorption line, respectively. We find that only a few absorbers show large values of Wr. About 1.1% of the total absorbers have Wrλ1548 ≥ 2.0 Å.

Abstract Copyright:

Journal keyword(s): quasars: absorption lines - quasars: general

VizieR on-line data: <Available at CDS (J/ApJS/215/12): table1.dat>

Simbad objects: 9705

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2019.09.21-15:57:42

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