dc.contributor.author |
Thévenin, F |
|
dc.contributor.author |
Parthasarathy, M |
|
dc.contributor.author |
Jasniewicz, G |
|
dc.date.accessioned |
2008-08-13T05:20:28Z |
|
dc.date.available |
2008-08-13T05:20:28Z |
|
dc.date.issued |
2000-07 |
|
dc.identifier.citation |
Astronomy and Astrophysics, Vol. 359, No. 1, pp.138 - 142 |
en |
dc.identifier.issn |
0004-6361 |
|
dc.identifier.uri |
http://hdl.handle.net/2248/3107 |
|
dc.description.abstract |
A LTE analysis of medium resolution spectra of HD 179821 has been made. Derived atmospheric parameters of HD 179821 are K, and [Fe/H]=-0.5. The position of the star in the H-R diagram, its high radial velocity (Vr=100 km s-1), its far infrared excess similar to PNe and its chemical composition suggest that HD 179821 is a low mass post-AGB carbon-poor supergiant and not a population I massive red supergiant. The underabundance of carbon and of the s-process element zirconium shows that HD 179821 has not gone through the third dredge-up. We emphasize the similarity of the chemical pattern of the post-AGB star HD 179821 and the C-poor halo PN DDDM-1. |
en |
dc.format.extent |
314213 bytes |
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dc.format.mimetype |
application/pdf |
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dc.language.iso |
en |
en |
dc.publisher |
European Southern Observatory |
en |
dc.relation.uri |
http://adsabs.harvard.edu/abs/2000A%26A...359..138T |
en |
dc.relation.uri |
http://aa.springer.de/bibs/0359001/2300138/small.htm |
en |
dc.subject |
Stars: Abundances |
en |
dc.subject |
Stars: Fundamental Parameters |
en |
dc.subject |
Stars: Individual: Hd 179821 |
en |
dc.subject |
Stars: AGB and Post-AGB |
en |
dc.title |
Chemical composition of HD 179821 (IRAS 19114+0002) |
en |
dc.type |
Article |
en |