The broad OVI absorber at z = 3.02 toward CTQ 325
Astrophysics
2009-11-10 v1
Abstract
We report on the multiphase absorption-line system detected at a redshift z = 3.021 in the spectrum of the quasi-stellar object CTQ 325 (z_em = 3.212). The system is displaced by ~14,000 km/s to the blue of the systemic velocity defined by the center of the symmetric OI quasar emission line. It consists of shallow and broad (~700 km/s, FWHM) absorption lines of HI 1215, CIV 1548,1550, and OVI 1032,1038, produced by collisionally ionized gas and of narrow absorption lines (FWHM < 20 km/s) of Ly-alpha, Ly-beta, ..., Ly-6, SiIII 1206, and CIII 977 produced by photoionized gas. Possible origins of this system are discussed.
Cite
@article{arxiv.astro-ph/0310141,
title = {The broad OVI absorber at z = 3.02 toward CTQ 325},
author = {S. A. Levshakov and S. D'Odorico and I. I. Agafonova and M. Dessauge-Zavadsky},
journal= {arXiv preprint arXiv:astro-ph/0310141},
year = {2009}
}
Comments
6 pages, 4 figures, to appear in A&A