Chemical diffusion in stellar convective regions

PANEI J. A.; BENVENUTO O. G.

Córdoba, Argentina

Congreso; X Reunión Regional Latinoamericana. de Astronomía - Unión Astronómica Internacional; 2001

Unión Astronómica Internacional

The aim of this work is to show the evolution of one massive star with a full spectrum of turbulence convective mixing. We present results for one star with mass 5.0 M_sun. We compute the evolution from the pre-sequence up the Asymptotic Giant Branch (AGB). Theoretical tracks are discussed. We describe in detail our evolutionary code employed. Several authors use a treatment with an instantaneous mixing for the convective regions, but we use a turbulence convective mixing that takes into account the convective region like a whole. We employed nuclear rates with thirty isotopes and one hundred seventy five, reactions. In particular we study the neutron abundances during the thermal pulses and the convective regions where the production rates are significant.