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- W2144889476 abstract "Thecalculatedintermediateandhighdegreep-mode frequenciesofstandardsolarmodelsshowgreaterdisagreement with the observations than low degree modes. This leads to the conclusion that the subatmospheric structure of the models has to be improved. We are presenting solar models with up-to-date input physics and controlled numerical accuracy of 10 5 .F or the outer boundary condition we use synthetic atmospheres t- ted to the interior solution at 20. In addition, a spatially variable mixing length parameter is employed to reproduce the pressure-temperature stratication of the outer convective zone calculated by 2D-hydrodynamical models we used for com- parison. With this changed subatmospheric structure we could improvetheagreementbetweenpredictedandobservedp-mode frequencies in our solar models. general purposes, the atmospheric and subphotospheric struc- ture will differ slightly from the real solar structure. At the present level of observational accuracy this difference might already be signicant. At the same time, highly sophisticated stellar atmosphere models have become available. This allows to use the bottom of these models for the outer boundary condi- tions of the interior stellar models. The tting point need not be the usual =2 =3 optical depth { and should not, because only athigheropticaldepthwillthediffusionapproximationbecome excellent.Besidesyieldingboundaryconditionstheatmosphere" @default.
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- W2144889476 date "1997-06-01" @default.
- W2144889476 modified "2023-10-14" @default.
- W2144889476 title "A solar model with improved subatmospheric stratification." @default.
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