A stellar endgame - the born-again Sakurai's object

Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/3248

Title:	A stellar endgame - the born-again Sakurai's object
Authors:	Asplund, M Gustafsson, B Lambert, D. L Kameswara Rao, N
Keywords:	Stars: Individual: Sakurai's Object Stars: Evolution Stars: AGB And Post-AGB Stars: Abundances Stars: Variables: Other Stars: Individual: FG SGE
Issue Date:	May-1997
Publisher:	European Southern Observatory
Citation:	Astronomy and Astrophysics , Vol. 321, No. 2, pp. L17 - L20
Abstract:	The surface chemical composition of this remarkable star shows that it is hydrogen-deficient, carbon-rich and enriched in the light s-process elements. Spectra taken in May and October 1996 indicate a decrease in the surface hydrogen abundance by 0.7dex in five months along with an increase in the abundances of Li, Sr, Y and Zr. The abundance changes are in agreement with the hypothesis of the star being a rapidly evolving "born-again" AGB star experiencing a final He-shell flash, similar to FGSge. The Sup/12C/sup/13C ratio in October is very low, also suggesting hydrogen ingestion. By chemical composition, Sakurai's object resembles the R Coronae Borealis (RCrB) stars.
URI:	http://hdl.handle.net/2248/3248
ISSN:	0004-6361
Appears in Collections:	IIAP Publications

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