Helioseismic solar models with the MESA evolution code
The MESA software package is an open source code for computing stellar evolution which is being actively developed by authors and Internet community. It allows many physical processes to be taken into account which occur inside the stars. We apply the MESA code to the task of computing standard solar model and to compare results with a model computed by HPCSE (code developed at Sternberg Astronomical Institute, Moscow State University). Models are quite close to each other what confirms quality of both evolution codes. We also use MESA to compute a model which includes modification of opacity and nuclear reaction rates. With proper modifications the solar model with low heavy element abundances conforms to current helioseismic results including convection zone depth, density, sound speed, helium abundance. Similar HPCSE model is closer to helioseismic results because the HPCSE code fits better to introduce modifications into physics.
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