Abundance analysis of cool extreme helium star: LSS 3378
arXiv:astro-ph/0604023 · doi:10.1111/j.1365-2966.2006.10398.x
Abstract
Abundance analysis of the cool extreme helium (EHe) star LSS 3378 is presented. The abundance analysis is done using LTE line formation and LTE model atmospheres constructed for EHe stars. The atmosphere of LSS 3378 shows evidence of H-burning, He-burning, and s-process nucleosynthesis. The derived abundances of iron-peak and alpha-elements indicate absence of selective fractionation or any other processes that can distort chemical composition of these elements. Hence, the Fe abundance (log epsilon(Fe) = 6.1) is adopted as an initial metallicity indicator. The measured abundances of LSS 3378 are compared with those of R Coronae Borealis (RCB) stars and with rest of the EHe stars as a group.
arXiv comment7 pages, 4 figures, 3 tables, MNRAS format, accepted for publication in MNRAS
References in corpus (4)
Cited by in corpus (13)
- Double white dwarf mergers and elemental surface abundances in extreme helium and R Coronae Borealis stars
- Fluorine in R Coronae Borealis Stars
- High-resolution spectroscopy of the R Coronae Borealis Star V Coronae Australis
- CNO abundances of HdC and RCB stars: a view of the nucleosynthesis in a white dwarf merger
- Discovery of Fluorine in Cool Extreme Helium Stars
- Neon and CNO Abundances for Extreme Helium Stars -- A Non-LTE Analysis
- The Galactic R Coronae Borealis stars : the C2 Swan bands, the carbon problem, and the 12C/13C ratio
- Detection of fluorine in hot Extreme Helium Stars
- Is the post-AGB star SAO 40039 mildly H-deficient?
- Revised surface abundances of R Coronae Borealis stars
- The distribution, kinematics and luminosities of extreme helium stars as probes of their origin and evolution
- Merged white dwarfs and nucleosynthesis
- Detection of Enhanced Germanium in a New Cool Extreme Helium Star A 980: Insights and Implications