文章基本信息

标题：On mixing at the core-envelope interface during classical nova outbursts
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作者：J. Casanova, J. Jose, E. García-Berro, A.C. Calder, S. N. Shore
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2010
卷号：2010
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Classical novae are stellar explosions in close binary systems, driven by mass transfer episodes. The material piles up under degenerate conditions, and a thermonuclear runaway (TNR) reaching Tpeak (1􀀀4)108 K ensues. In the explosion, about 10􀀀4􀀀10􀀀5M are ejected into the interstellar medium, containing large amounts of 13C, 15N, and 17O. To account for the energetics of the explosion as well as for the inferred abundance pattern, mixing at the core-envelope interface has been invoked. Over 40 years, theoreticians have been exploring different mixing mechanisms that could lead to the observed metallicity enhancement in the ejecta. In this study we show that Kelvin-Helmholtz instabilities can naturally dredge up carbon and oxygen from the outer layers of the with dwarf core, leading to a final envelope metallicity above 0:20.