Document Stellar Evolution and Seismic Tools for Asteroseismology - Diffusive Processes in Stars and Seismic Analysis
C.W. Straka, Y. Lebreton and M.J.P.F.G. Monteiro (eds)
EAS Publications Series, 26 (2007) 37-48
DOI: 10.1051/eas:2007124
Atomic Diffusion and Radiative Accelerations in Stars
G. AlecianLUTH (Observatoire de Paris - CNRS), Observatoire de Meudon, 92195 Meudon Cedex, France
georges.alecian@obspm.fr
(Published online: 20 June 2007)
Abstract
Atomic diffusion can have detectable effects in many kinds of stars, each time
that mixing processes are not efficient enough to prevent the build up of
abundance stratifications. In this talk, after presentation of some general
aspects about diffusion processes in stars, I will discuss the role of radiative
acceleration which is one of the important quantities determining diffusion
velocities. I will also discuss some aspects specific to stellar atmospheres, in
particular for stars exhibiting strong magnetic fields.
© EAS, EDP Sciences 2007