dc.contributor.author |
Molina, R. E |
|
dc.contributor.author |
Giridhar, S |
|
dc.contributor.author |
Pereira, C. B |
|
dc.contributor.author |
Arellano Ferro, A |
|
dc.contributor.author |
Muneer, S |
|
dc.date.accessioned |
2020-11-17T14:15:01Z |
|
dc.date.available |
2020-11-17T14:15:01Z |
|
dc.date.issued |
2014-10 |
|
dc.identifier.citation |
Revista Mexicana de Astronomica y Astrofisica, Vol. 50, No. 2, pp. 293-306 |
en_US |
dc.identifier.issn |
0185-1101 |
|
dc.identifier.uri |
http://prints.iiap.res.in/handle/2248/7131 |
|
dc.description |
Open Access © Institute de Astronomia https://arxiv.org/pdf/1405.6746.pdf |
en_US |
dc.description.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. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Institute de Astronomia |
en_US |
dc.subject |
Fundamental Parameters |
en_US |
dc.subject |
Bundances |
en_US |
dc.subject |
Depletion |
en_US |
dc.subject |
Stars: AGB and post-AGB |
en_US |
dc.title |
Spectroscopic analysis of four post-AGB candidates |
en_US |
dc.type |
Article |
en_US |