A precision-controlled solar model with realistic subatmospheric stratification

Details A precision-controlled solar model with realistic subatmospheric stratification A precision-controlled solar model with realistic subatmospheric stratification

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997assl..225...65s&link_type=abstract

SCORe'96 : Solar Convection and Oscillations and their Relationship, Proceedings of a workshop, held in Aarhus, Denmark, May 27

Astronomy and Astrophysics

Astrophysics

Superadiabatic Layer, Frequencies

Scientific paper

The Garching stellar evolution code has been modified to allow the calculation of an up-to-date solar model. The modifications are of numerical and physical nature. Concerning the first aspect, the spatial as well as the temporal discretization of the PDEs can now be done with a controlled and guaranteed accuracy of up to $\approx 10^{-5}$. With regard to the second aspect, latest input physics tables, diffusion and synthetic atmospheres used as outer boundary conditions at $\tau \approx 20$ have been implemented. In addition, a spatially variable mixing length has been employed to reproduce the T-P-stratification of the outer convective layers as calculated by 2D-hydrodynamical models. We find that the changes in the subatmospheric regions lead to a further improvement of the solar model.

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