2006/02/01 by S. A. Levshakov, M. Centurión, M. Centurion +3 · 3 citations
Physics and Astronomy · #Astrophysics and Star Formation Studies #Gamma-ray bursts and supernovae #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1051/0004-6361:200600001
published as Astron.Astrophys. 447 (2006) L21-L24 · 4 pages, 3 figures, published in A&A, 447, L21-L24, 2006
openalex publication_date 2006/02/01 · arxiv created 2006/02/14 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
<i>Context.<i/> <i>Aims.<i/>We analyzed the lines associated with the damped Ly<i>α<i/> system observed at = 1.15 in the spectrum of HE 0515–4414 to derive the <sup>12<sup/>C/<sup>13<sup/>C ratio. <i>Methods.<i/> The spectrum was obtained by means of the UV-Visual Echelle Spectrograph (UVES) at the ESO Very Large Telescope (VLT). <i>Results.<i/>The obtained lower limit <sup>12<sup/>C/<sup>13<sup/>C (2<i>σ<i/> C.L.) shows for the first time that the abundance of <sup>13<sup/>C in the extragalactic intervening clouds is very low. This rules out a significant contribution from intermediate-mass stars to the chemical evolution of matter sampled by this line of sight. The estimated low amount of <sup>13<sup/>C is in agreement with low abundances of nitrogen observed in damped Ly<i>α<i/> systems – the element produced in the same nuclear cycles and from about the same stars as <sup>13<sup/>C. <i>Conclusions.<i/>