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

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dc.contributor.author Asplund, M
dc.contributor.author Gustafsson, B
dc.contributor.author Lambert, D. L
dc.contributor.author Kameswara Rao, N
dc.date.accessioned 2008-08-22T10:21:37Z
dc.date.available 2008-08-22T10:21:37Z
dc.date.issued 1997-05
dc.identifier.citation Astronomy and Astrophysics , Vol. 321, No. 2, pp. L17 - L20 en
dc.identifier.issn 0004-6361
dc.identifier.uri http://hdl.handle.net/2248/3248
dc.description.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. en
dc.format.extent 205916 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher European Southern Observatory en
dc.relation.uri http://aa.springer.de/bibs/7321002/2300l17/small.htm en
dc.subject Stars: Individual: Sakurai's Object en
dc.subject Stars: Evolution en
dc.subject Stars: AGB And Post-AGB en
dc.subject Stars: Abundances en
dc.subject Stars: Variables: Other en
dc.subject Stars: Individual: FG SGE en
dc.title A stellar endgame - the born-again Sakurai's object en
dc.type Article en

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