| Issue |
A&A
Volume 435, Number 1, May III 2005
|
|
|---|---|---|
| Page(s) | 17 - 27 | |
| Section | Extragalactic astronomy | |
| DOI | https://doi.org/10.1051/0004-6361:20041655 | |
| Published online | 25 April 2005 | |
HE 0141-3932: A bright QSO with an unusual emission line spectrum and associated absorption
1
Hamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, 21029 Hamburg, Germany
2
Department of Theoretical Astrophysics, Ioffe Physico-Technical Institute, 194021 St. Petersburg, Russia e-mail: lev@astro.ioffe.rssi.ru
3
Departamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago, Chile
Received:
13
July
2004
Accepted:
19
January
2005
HE 0141-3932 (
= 1.80)
is a bright blue radio-quite quasar with
an unusually weak Lyα emission line.
Large redshift differences (
) are observed
between high ionization and low ionization emission lines.
Absorption systems identified at 
= 1.78, 1.71, and 1.68
show mild oversolar metallicities (
) and can be attributed
to the associated gas clouds ejected from the circumnuclear region.
The joint analysis of the emission and absorption lines leads to the
conclusion that this quasar is seen almost pole-on.
Its apparent luminosity may be Doppler boosted by ∼10 times.
The absorbing gas shows a high abundance of Fe, Mg and Al
(![$\rm [Fe, Mg, Al/C] \simeq 0.15\pm0.10$](/articles/aa/abs/2005/19/aa1655-04/aa1655-04_tex_eq5.png)
)
along with underabundance of N (![$\rm [N/C] \leq -0.5$](/articles/aa/abs/2005/19/aa1655-04/aa1655-04_tex_eq6.png)
).
This abundance pattern is at variance with current chemical evolution models
of QSOs predicting ![$\rm [N/C] \gtrsim 0$](/articles/aa/abs/2005/19/aa1655-04/aa1655-04_tex_eq7.png)
and ![$\rm [Fe/C] <0$](/articles/aa/abs/2005/19/aa1655-04/aa1655-04_tex_eq8.png)
at 
.
Key words: cosmology: observations / line: formation / line: profiles / galaxies: abundances / quasars: absorption lines / quasars: individual: HE 0141-3932
© ESO, 2005
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