Abundance analyses of the new R Coronae Borealis stars: ASAS-RCB-8 and ASAS-RCB-10
arXiv:1707.01268 · doi:10.1088/1538-3873/aa7f25
Abstract
Abundance analyses of the two newly discovered R Coronae Borealis (RCB) stars ASAS-RCB-8 and ASAS-RCB-10 were conducted using high-resolution optical spectra and model atmospheres. Their chemical compositions place the pair among the majority class of RCBs. ASAS-RCB-10 is one of the most N-poor majority RCBs with an above average O abundance. Relative to ASAS-RCB-10, ASAS-RCB-8 is H poor by 1.6 dex, O-poor by 0.7 dex but N-rich by 0.8 dex suggesting a higher contamination by CNO-cycled material.
Accepted for publication in PASP
References in corpus (9)
- The Gaia mission
- Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
- Fluorine in R Coronae Borealis Stars
- A search for diffuse bands in the circumstellar envelopes of post-AGB stars
- R Coronae Borealis stars in the Galactic Bulge discovered by EROS-2
- Discovery of Bright Galactic R Coronae Borealis and DY Persei Variables: Rare Gems Mined from ACVS
- On the binary helium star DY Centauri: Chemical composition and evolutionary state
- Mid-Infrared Variations of R Coronae Borealis Stars
- High-resolution optical spectroscopy of the R Coronae Borealis star V532 Ophiuchi at maximum light