2001/02/09 by S. D'Odorico, Sandro D'Odorico, Miroslava Dessauges-Zavadsky +3 · 4 citations
Physics and Astronomy · #Absorption (acoustics) #Astronomy and Astrophysical Research #Baryon #COSMIC cancer database #Deuterium #Gamma-ray bursts and supernovae #Hydrogen #Lyman limit #Metallicity #Quantum Chromodynamics and Particle Interactions #Spectral line #astro-ph
paper · pdf · doi:10.1051/0004-6361:20010183
5 pages, 4 figures, Accepted for publication in A&A Letters
arxiv created 2001/02/09 · openalex publication_date 2001/03/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present the first D/H measurement in a damped Lyα (hereafter DLA) system at towards QSO 0347-3819 obtained from the UVES-VLT spectra. The DLA absorber has a metallicity of [Zn/H] and a relatively simple velocity structure, with two dominating components detected in several metal lines. The hydrogen Lyman series can be followed down to Ly12 thanks to the high UV-Blue efficiency of UVES. The best fit of the Lyman series lines, and in particular of Lyϵ, Ly8, Ly10 and Ly12, relatively free of local contamination, is obtained when the DI absorption is included in the two main components. The measured deuterium column density yields close to other low D/H values from Lyman limit systems. The corresponding values for the baryon to photon ratio and the baryon density derived from D/H are and respectively.