2017A&A...606A..13F


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.10CEST02:58:37

2017A&A...606A..13F - Astronomy and Astrophysics, volume 606A, 13-13 (2017/10-1)

The High AV Quasar Survey: A z = 2.027 metal-rich damped Lyman-α absorber towards a red quasar at z = 3.21.

FYNBO J.P.U., KROGAGER J.-K., HEINTZ K.E., GEIER S., MOLLER P., NOTERDAEME P., CHRISTENSEN L., LEDOUX C. and JAKOBSSON P.

Abstract (from CDS):

It is important to understand the selection effects behind the quasar samples to fully exploit the potential of quasars as probes of cosmic chemical evolution and the internal gas dynamics of galaxies; in particular, it is vital to understand whether the selection criteria exclude foreground galaxies with certain properties, most importantly a high dust content. Here we present spectroscopic follow-up from the 10.4m GTC telescope of a dust-reddened quasar, eHAQ0111+0641, from the extended High AV Quasar (HAQ) survey. We find that the z=3.21 quasar has a foreground damped Lyman-α absorber (DLA) at z=2.027 along the line of sight. The DLA has very strong metal lines due to a moderately high metallicity with an inferred lower limit of 25% of the solar metallicity, but a very large gas column density along the line of sight in its host galaxy. This discovery is further evidence that there is a dust bias affecting the census of metals, caused by the combined effect of dust obscuration and reddening, in existing samples of z>2 DLAs. The case of eHAQ0111+0641 illustrates that dust bias is not only caused by dust obscuration, but also dust reddening.

Abstract Copyright: © ESO, 2017

Journal keyword(s): quasars: general - quasars: absorption lines - quasars: individual: eHAQ0111+0641 - quasars: individual: eHAQ0111+0641

VizieR on-line data: <Available at CDS (J/A+A/606/A13): list.dat sp/*>

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9446 1
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14832 1
3 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 2069 0
4 GRB 080607 gB 12 59 47.14 +15 55 09.6           ~ 209 0
5 GRB 050401 gB 16 31 28.84 +02 11 14.5           ~ 302 0

    Equat.    Gal    SGal    Ecl

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2020.07.10-02:58:37

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