Gravitational settling in pulsating subdwarf B stars and their progenitors
Glebbeek, E × Thoul, A. A Dupret, M. -A Stancliffe, R. J Nelemans, G Aerts, Conny #
Edp sciences s a
Astronomy & astrophysics vol:511 pages:1-10
Context. 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.