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Chemical composition of HD 179821 (IRAS 19114+0002)

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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
dc.format.mimetype application/pdf
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

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