Spectroscopic Analysis of Two Carbon Rich Post-AGB Stars
arXiv:astro-ph/0109068 · doi:10.1086/324216
Abstract
The chemical compositions of the C-rich pAGB stars IRAS 05113+1347 and IRAS 22272+5424 are determined from high-resolution optical spectra using standard LTE model atmosphere-based techniques. The stars are C, N, and -process enriched suggesting efficient operation of the third-dredge up in the AGB star following a first dredge-up that increased the N abundance. Lithium is present with an abundance requiring Li manufacture. With this pair, abundance analyses are now available for 11 C-rich pAGBs. A common history is indicated and, in particular, the -abundances, especially the relative abundances of light to heavy -process elements, follow recent predictions for the third dredge-up in AGB stars.
41 pages (including 10 figs). 2001, ApJ, Accepted
References in corpus (3)
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