EAS Publications Series

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) 137-144
DOI: 10.1051/eas:2007132

Time Dependent Convection vs. Frozen Convection Approximations

A. Grigahcène^{1, 2}, M.-A. Dupret³ and R. Garrido²

¹ Algiers Observatory-CRAAG, BP. 63 Bouzareah, 16340 Algiers, Algeria
² IAA-CSIC, Ap. 3004, 18080 Granada, Spain
³ Observatory of Paris, LESIA, CNRS UMR 8109, 92195 Meudon, France

(Published online: 20 June 2007)

Abstract
The approximation known as Frozen Convection has been widely used in the context of stellar oscillations due to the lack of a Time Dependent Convection theory. This approximation supposes to neglect the interaction between convection and oscillations and there are different ways to do it. The choice can affect theoretical predictions concerning the non-adiabatic treatment of the stellar oscillations. In fact, fictitious excitation or damping of the pulsation modes can be produced depending on the approximation used.