A cold metal-poor cloud traced by a weak Mg II absorption at z \mathsfsl≃ 0.45

2007/05/25 by V. D’Odorico, Valentina D'Odorico
Physics and Astronomy · #Astrophysics and Star Formation Studies #Galaxies: Formation, Evolution, Phenomena #Stellar, planetary, and galactic studies #astro-ph

paper · pdf · doi:10.1051/0004-6361:20077159

published as Astronomy & Astrophysics, 2007, v. 470, pp. 523-529 · 7 pages, 9 figures. A&A in press

openalex publication_date 2007/05/25 · arxiv created 2007/06/22 · arxiv updated 2009/12/01 · openalex created_date 2022/10/06 · openalex updated_date 2026/08/01

Abstract

Aims.We present the observations of a weak Mg ii absorption system detected at z ~ 0.452 in the UVES high-resolution spectrum of the QSO HE0001-2340. The weaker of the two Mg ii components forming the system shows associated absorptions due to Si i, Ca i, and Fe i observed for the first time in a QSO spectrum. We investigate the nature of this absorber by comparing its properties with those of different classes of absorbers and reproducing its ionization conditions with photoionization models.

Citations

• CLOUDY 90: Numerical Simulation of Plasmas and Their Spectra
• Ionization Properties and Elemental Abundances in Damped Lyα Systems