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Title: Chemical composition of A–F type post-AGB candidates
Authors: Giridhar, S
Molina, R
Arellano Ferro, A
Selvakumar, G
Keywords: Post-AGB Stars;Abundances;Circumstellar Matter: Stars
Issue Date: Jul-2010
Publisher: Wiley-Blackwell
Citation: Monthly Notices of the Royal Astronomical Society, Vol. 406, No. 1, pp. 290–306
Abstract: An abundance analysis has been conducted for a sample of nine post-AGB candidate stars; eight of them have not been explored before.We find four very promising objects like HD 105262, HD 53300 and CpD−62o5428 among them. We find strong evidence of dust-gas separation through selective depletion of refractive elements in HD 105262. The same effect is also observed in HD 53300, CpD−62o5428 and HD 114855 although abundance peculiarities are relatively smaller for the last two stars. We find strong enrichment of nitrogen for HD 725, HD 842, HD 1457, HD 9233 and HD 61227 but no further evidence to support their post-AGB nature. We have compared the observed [N/C] ratios of these stars with the predictions of evolutionary models which include the rotation induced mixing.
Description: Restricted Access
ISSN: 0035-8711
???metadata.dc.rights???: © Royal Astronomical Society
Appears in Collections:IIAP Publications

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