Investigation of numerical accuracy of ZAMS models of one solar mass

Details Investigation of numerical accuracy of ZAMS models of one solar mass Investigation of numerical accuracy of ZAMS models of one solar mass

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990soph..128....7m&link_type=abstract

(IAU, The Inside the Sun Colloquium, 121st, Versailles, France, May 22-26, 1989) Solar Physics (ISSN 0038-0938), vol. 128, July

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12

Radiative Transfer, Solar Interior, Solar Oscillations, Computational Astrophysics, Opacity, Spline Functions, Stellar Models, Stellar Structure

Scientific paper

Helioseismology requires solar models computed with great accuracy. Results of investigations about the incidence in ZAMS models of one solar mass of the numerical errors arising from the interpolation of opacity tables and from the integration of the atmosphere are reported. Though the numerical accuracy reached by some actual codes is of the order of 0.0001 (Christensen-Dalsgaard, 1989), it looks optimistic to expect a numerical accuracy better than few percent for models without mesh refinements in opacity tables and more consistency between atmospheric and internal structure models. Since most of the calculations were made with a new code based on spline/collocation, the numerical method used is outlined in an Appendix.

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