SIMBAD references

1997A&A...321L..17A - Astronomy and Astrophysics, volume 321, L17-20 (1997/5-2)

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

ASPLUND M., GUSTAFSSON B., LAMBERT D.L. and RAO N.K.

Abstract (from CDS):

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 12C/13C ratio in October is very low, also suggesting hydrogen ingestion. By chemical composition, Sakurai's object resembles the R Coronae Borealis (RCrB) stars.

Abstract Copyright:

Journal keyword(s): stars: individual: Sakurai's object - Stars: evolution - Stars: AGB and post-AGB - Stars: abundances - Stars: variables: other - stars: individual: FG Sge

Simbad objects: 13

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2021.05.10-10:33:00

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