Statistics – Computation
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aspc...40...63p&link_type=abstract
In: Inside the stars; Proceedings of the 137th IAU Colloquium, Univ. of Vienna, Austria, Apr. 13-18, 1992 (A93-53126 23-90), p.
Statistics
Computation
1
Helioseismology, Stellar Convection, Stellar Evolution, Stellar Physics, Computational Astrophysics, Mixing Length Flow Theory, Solar Convection (Astronomy), Stellar Models, Turbulence Models
Scientific paper
Two evolutionary models of the sun have been tested using helioseismological data. The two models use the same input microphysics (nuclear reaction rates, opacity, equation of state) and the same numerical evolutionary code, but differ in the treatment of turbulent convection. The first model employs the standard mixing - length theory of convection, while the second one employs a new turbulent convection model which overcomes some basic inconsistencies of the standard theory of convection. The test rests on the calculation of p-mode eigenfrequencies and on the comparison with the helioseismological data. The comparison shows an overall improvement of the eigenfrequencies calculated with the new model with respect to those calculated with the standard model, although it appears that both models still suffer from inaccuracies especially in the treatment of the surface layers.
Canuto Vittorio M.
Mazzitelli Irene
Paterno' Lucio
Ventura Rodrigo
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