EAS Publications Series
Volume 26, 2007Stellar Evolution and Seismic Tools for Asteroseismology - Diffusive Processes in Stars and Seismic Analysis
|Page(s)||79 - 89|
|Published online||20 June 2007|
C.W. Straka, Y. Lebreton and M.J.P.F.G. Monteiro (eds)
EAS Publications Series, 26 (2007) 79-89
The Treatment of Overshooting in Stellar Modelling: Instantaneous and Diffusive Approach
INAF – Osservatorio Astronomico di Roma, via Frascati 33,
00040 MontePorzio Catone (RM), Italy
Convective overshoot is a physical mechanism for which no recipe based on first principles is available; hence the necessity of assuming some parametrisations, which undermine the predictive power of the current generation of stellar models. We evidentiate the non local aspects of the convective phenomenon particularly in the proximities of the convective borders, and identify some cases when the use of a diffusive rather than the classic instantaneous approach to describe overshooting is highly recommended.
© EAS, EDP Sciences, 2007
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