The broad OVI absorber at z = 3.02 toward CTQ 325

Details The broad OVI absorber at z = 3.02 toward CTQ 325 The broad OVI absorber at z = 3.02 toward CTQ 325

2003-10-06

arxiv.org/abs/astro-ph/0310141v1

Astron.Astrophys. 413 (2004) 827-831

Astronomy and Astrophysics

Astrophysics

6 pages, 4 figures, to appear in A&A

Scientific paper

10.1051/0004-6361:20031559

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.

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