EDP Sciences
Free Access
Volume 383, Number 3, March I 2002
Page(s) 813 - 822
Section Extragalactic astronomy
DOI https://doi.org/10.1051/0004-6361:20011807

A&A 383, 813-822 (2002)
DOI: 10.1051/0004-6361:20011807

Metal abundances and kinematics of quasar absorbers

I. Absorption systems toward J2233-606
S. A. Levshakov1, I. I. Agafonova2, M. Centurión3 and I. E. Mazets2

1  Division of Theoretical Astrophysics, National Astronomical Observatory, Mitaka, Tokyo 181-8588, Japan
2  Department of Theoretical Astrophysics, Ioffe Physico-Technical Institute, 194021 St. Petersburg, Russia
3  Osservatorio Astronomico di Trieste, Via G. B. Tiepolo 11, 34131 Trieste, Italy

(Received 4 October 2001 / Accepted 18 December 2001)

The metal line profiles of different ions observed in high $\ion{H}{i}$ column density systems [ N( $\ion{H}{i}$) > 1016 cm -2] in quasar spectra can be used to constrain the ionization structure and kinematic characteristics of the absorbers. For these purposes, a modified Monte Carlo Inversion (MCI) procedure was applied to the study of three absorption systems in the spectrum of the HDF-South quasar J2233-606 obtained with the UVES spectrograph at the VLT/Kueyen telescope. The MCI does not confirm variations of metal abundances within separate systems which were discussed in the literature. Instead, we found that an assumption of a homogeneous metal content and a unique photoionizing background is sufficient to describe the observed complex metal profiles. It was also found that the linear size L and the line-of-sight velocity dispersion $\sigma_{\rm v}$ measured within the absorbers obey a scaling relation, namely, $\sigma_{\rm v}$ increases with increasing L, and that metal abundance is inversely proportional to the linear size of the system: the highest metallicity was measured in the system with the smallest L.

Key words: cosmology: observations -- line: formation -- line: profiles -- galaxies: abundances -- quasars: absorption lines -- quasars: individual: J2233-606

Offprint request: S. A. Levshakov, lev@yso.mtk.nao.ac.jp

SIMBAD Objects

© ESO 2002

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.