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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

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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 

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