Hostname: page-component-6bf8c574d5-h6jzd Total loading time: 0.001 Render date: 2025-02-21T22:45:44.793Z Has data issue: false hasContentIssue false
  • English
  • Français

Sakurai's object – stellar evolution in real time

Published online by Cambridge University Press:  25 May 2016

Martin Asplund
Martin Asplund*
Affiliation:
Nordita, Blegdamsvej 17, DK-2100 København Ø, Denmark

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The born-again giant Sakurai's object is currently experiencing its second stage as an AGB-star. Furthermore, Sakurai's object has shown an unprecedented rapid stellar evolution since discovery in 1996, both in terms of a continued cooling of the photosphere and spectacular changes in chemical composition on a time-scale of a mere few months. The surface cooling and abundance alterations of H, Li and the s-elements are the direct consequences of the expansion, mixing and nucleosynthesis which has ensued as a result of a final He-shell flash occurring while the star was descending the white dwarf cooling track. Sakurai's object shows striking similarities with the R CrB stars in both chemical composition and visual variability.

Type
Part 5. Non-Spherical Mass Loss, Binarity, Post-AGB Evolution
Information
Symposium - International Astronomical Union , Volume 191: Asymptotic Giant Branch Stars , 1999 , pp. 481 - 486
Copyright
Copyright © Astronomical Society of the Pacific 1999 

References

Asplund, M., Gustafsson, B., Kiselman, D., Eriksson, K., 1997a, A&A 318, 521 Google Scholar
Asplund, M., Gustafsson, B., Lambert, D.L., Rao, N.K., 1997b, A&A 321, L17 Google Scholar
Asplund, M., Gustafsson, B., Rao, N.K., Lambert, D.L., 1998a, A&A 332, 651 Google Scholar
Asplund, M., Lambert, D.L., Kipper, T., Shetrone, M.D., 1998b, A&A, submitted Google Scholar
Duerbeck, H.W., Benetti, S., Gautschy, A., et al., 1997, AJ 114, 1657 CrossRefGoogle Scholar
Iben, I. Jr., MacDonald, J., 1995, in White dwarfs, Koester, D. and Werner, K. (eds.), Springer, Berlin, p. 48 Google Scholar
Kipper, T., Klochkova, V.G., 1997, A&A 324, L65 Google Scholar
Lambert, D.L., Rao, N.K., Gustafsson, B., Asplund, M., 1998, A&A, submitted Google Scholar
Shetrone, M.D., Keane, M., 1998, in Faint blue stars, Davis-Philip, A.G. (ed.), L. Davis Press, Schenectady, in press Google Scholar