The evolutionary status of HD 179821

Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/4646

Title:	The evolutionary status of HD 179821
Authors:	Thévenin, F Jasniewicz, G Parthasarathy, M
Keywords:	HD 179821 Star in Post-AGB Stage
Issue Date:	Aug-2001
Publisher:	Kluwer Academic Publishers
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
Series/Report no.:	Astrophysics and Space Science Library; Vol. 265
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.
Description:	Restricted Access
URI:	http://hdl.handle.net/2248/4646
ISBN:	0-7923-7145-3
Appears in Collections:	IIAP Publications

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