A stellar endgame -- the born-again Sakurai's object
| dc.creator | Asplund, M. | |
| dc.creator | Gustafsson, B. | |
| dc.creator | Lambert, D. L. | |
| dc.creator | Rao, N. K. | |
| dc.date | 1997-04-01 | |
| dc.date.accessioned | 2026-07-25T12:56:24Z | |
| dc.description | 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 0.7 dex 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 FG Sge. The C^12/C^13 ratio in October is very low, also suggesting hydrogen ingestion. By chemical composition, Sakurai's object resembles the R Coronae Borealis (R CrB) stars. | |
| dc.description | 4 pages; A&A; 2 postscript figures; accepted for publication in Astronomy & Astrophysics, Letters to the editors | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9704005 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9704005 | |
| dc.identifier.uri | https://dspace.dare.co.zw/handle/123456789/13079 | |
| dc.subject | Astrophysics | |
| dc.title | A stellar endgame -- the born-again Sakurai's object | |
| dc.type | text |