2013/11/25 by S. Sumangala Rao, Rao, S. Sumangala, Sunetra Giridhar +1 · 1 citation
Physics and Astronomy · #Astro and Planetary Science #Astronomy and Astrophysical Research #FOS: Physical sciences #Solar and Stellar Astrophysics (astro-ph.SR) #Stellar, planetary, and galactic studies #astro-ph.SR
paper · pdf · doi:10.48550/arxiv.1311.6496
18 Pages, 6 Figures, Accepted for Publication in Revista Mexicana de Astronomia y Astrofisica (RevMexxAA), Will appear in Vol.50, No. 1, April, 2014 issue of the Journal
arxiv created 2013/11/25 · openalex publication_date 2013/11/25 · arxiv updated 2013/11/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We have undertaken a comprehensive abundance analysis for a sample of relatively unexplored RV Tauri and RV Tauri like stars to further our understanding of post-Asymptotic Giant Branch (post-AGB) evolution. From our study based on high resolution spectra and grid of model atmospheres, we find indications of mild s-processing for V820 Cen and IRAS 06165+3158. On the other hand, SU Gem and BT Lac exhibit the effects of mild dust-gas winnowing. We have also compiled the existing abundance data on RV Tauri objects and find that a large fraction of them are afflicted by dust-gas winnowing and now added by the present work, we find a small group of two RV Tauris showing mild s-process enhancement in our Galaxy. With two out of three reported s-process enhanced objects belonging to RV Tauri spectroscopic class C, these intrinsically metal-poor objects appear to be promising candidates to analyse the possible s-processing in RV Tauri stars.