The evolutionary status of HD 179821

Thévenin, F; Jasniewicz, G; Parthasarathy, M

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dc.contributor.author	Thévenin, F
dc.contributor.author	Jasniewicz, G
dc.contributor.author	Parthasarathy, M
dc.date.accessioned	2009-07-16T13:40:54Z
dc.date.available	2009-07-16T13:40:54Z
dc.date.issued	2001-08
dc.identifier.citation	Szczerba, R. and Garny, S. K., eds., Post-AGB objects as a phase of stellar evolution, Astrophysics and Space Science Library, Vol. 265, Proceedings of the Torun Workshop held July 5 - 7, 2000, pp. 313 – 316	en
dc.identifier.isbn	0-7923-7145-3
dc.identifier.uri	http://hdl.handle.net/2248/4646
dc.description	Restricted Access
dc.description.abstract	HD 179821 (IRAS 19114+0002) is classified as a moderately metal-poor ([Fe/H] = - 0.5) post-AGB star of Teff = 5660 K and also as a very massive supergiant of Teff = 6750 K. Recent detailed studies of this star are not able to establish whether HD 179821 is a low mass star in post-AGB stage of evolution or a massive (30 Solar Mass) yellow supergiant caught in between RGB and Wolf Rayet phase (Reddy and Hrivnak (1999), Jura and Werner (1999), Thévenin et.al (2000)). Our LTE analysis of the spectrum of HD 179821 and the recent radio study of circumstellar envelope by Josselin and Lébre (2000) favours the hypothesis that it is a low mass star in post-AGB stage of evolution.	en
dc.language.iso	en	en
dc.publisher	Kluwer Academic Publishers	en
dc.relation.ispartofseries	Astrophysics and Space Science Library; Vol. 265
dc.relation.uri	http://adsabs.harvard.edu/abs/2001ASSL..265..313T	en
dc.subject	HD 179821	en
dc.subject	Star in Post-AGB Stage	en
dc.title	The evolutionary status of HD 179821	en
dc.type	Article	en