Behaviour of radiative accelerations in stars

Details Behaviour of radiative accelerations in stars Behaviour of radiative accelerations in stars

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000mnras.319..677a&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 319, Issue 3, pp. 677-684.

Astronomy and Astrophysics

Astronomy

12

Diffusion, Stars<X>: </X> Abundances

Scientific paper

Diffusion processes are able to stratify elements in stars on time-scales shorter than the evolution time on the main sequence. According to the efficiency of these diffusion processes, which depend on the radiative accelerations, abundances are time-dependent and inhomogeneous outside the stellar core. Large atomic and opacity data bases allow accurate computations of radiative accelerations, and several authors have developed efficient methods taking advantage of these large data bases. In the present work, these powerful tools are used to improve our knowledge on how radiative accelerations depend on the abundances of elements in stellar plasma. In this study, we test the behaviours of radiative accelerations that are usually supposed. The results we obtain give some clues for future attempts to simplify the calculations of these accelerations.

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