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http://hdl.handle.net/2248/7131
Title: | Spectroscopic analysis of four post-AGB candidates |
Authors: | Molina, R. E Giridhar, S Pereira, C. B Arellano Ferro, A Muneer, S |
Keywords: | Fundamental Parameters Bundances Depletion Stars: AGB and post-AGB |
Issue Date: | Oct-2014 |
Publisher: | Institute de Astronomia |
Citation: | Revista Mexicana de Astronomica y Astrofisica, Vol. 50, No. 2, pp. 293-306 |
Abstract: | We have done a detailed abundance analysis of four unexplored cand idate post- Asymptotic Giant Branch(AGB) stars IRAS 13110- 6629, IRAS 175 79 - 3121, IRAS 18321- 1401 and IRAS 18489- 0629 using high resolution spectra. W e have constructed Spectral Energy Distributions (SED) for these objects using the existing photometric data combined with infrared (IR) fluxes. For all sample stars, the S EDs exhibit double peaked energy distribution with well separated IR peaks showing th e presence of dusty circumstellar material. The CNO abundances indicate the production of N via CN cycling, but observed [C/Fe] indicates the mixing of carbon produce d by He burning by third dredge up although C/O ratio remains less that 1. A moderat e DG effect is clearly seen for IRAS 18489 - 0629 and IRAS 17579- 3121 while a large scatter observed in depletion plots for IRAS 18321- 1401 and IRAS 13110 - 6629 indicat e the presence of other processes affecting the observed abundance pattern. |
Description: | Open Access © Institute de Astronomia https://arxiv.org/pdf/1405.6746.pdf |
URI: | http://prints.iiap.res.in/handle/2248/7131 |
ISSN: | 0185-1101 |
Appears in Collections: | IIAP Publications |
Files in This Item:
File | Description | Size | Format | |
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Spectroscopic analysis of four post-AGB candidates.pdf | Open Access | 637.22 kB | Adobe PDF | ![]() View/Open |
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