Gravitational settling in pulsating subdwarf B stars and their progenitors

Haili Hu, Evert Glebbeek, Anne Thoul, Marc-Antoine Dupret, Richard James Stancliffe, Gijs Nelemans, Conny Aerts

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Abstract

Diffusion of atoms can be important during quiescent phases of stellar evolution. Particularly in the very thin inert envelopes of subdwarf B stars, diffusive movements will considerably change the envelope structure and the surface abundances on a short timescale. Also, the subdwarfs will inherit the effects of diffusion in their direct progenitors, namely giants near the tip of the red giant branch. This will influence the global evolution and the pulsational properties of subdwarf B stars.
Original languageEnglish
Pages (from-to)A87-1 - A87-10
Number of pages10
JournalAstronomy & Astrophysics
Volume511
Issue number1
DOIs
Publication statusPublished - 2010

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