Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-11-08
Astronomy and Astrophysics
Astrophysics
88 pages, 8 figures, accepted for publication in ApJS
Scientific paper
10.1086/502800
A high-precision two-dimensional stellar evolution code has been developed for studying solar variability due to structural changes produced by varying internal magnetic fields of arbitrary configurations. Specifically, we are interested in modeling the effects of a dynamo-type field on the detailed internal structure and on the global parameters of the Sun. The high precision is required both to model very small solar changes (of order of $10^{-4}$) and short time scales (or order of one year). It is accomplished by using the mass coordinate to replace the radial coordinate, by using fixed and adjustable time steps, a realistic stellar atmosphere, elements diffusion, and by adjusting the grid points. We have also built into the code the potential to subsequently include rotation and turbulence. The current code has been tested for several cases, including its ability to reproduce the 1-D results.
Basu Sarbani
Demarque Pierre
Li Ling-Huai
Sofia Sabatino
Ventura Paolo
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