Standard and non-standard solar models.

Guzik, J. A. ; Nueforge-Verheecke, C.

Technical Information Center Oak Ridge Tennessee

关键词: Star models;    Solar radiation;    Standardization;   

RP-ID  :  DE2001785414

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

We summarize the physical input and assumptions commonly adopted in modern standard solar models that also produce good agreement with solar oscillation frequencies. We discuss two motivations for considering non-standard models: the solar neutrino problem and surface lithium abundance problem. We begin to explore the potential for mixed core models to solve the neutrino problem, and compare the structure, neutrino flux, and oscillation frequency predictions for several models in which the inner 25% of the radius is homogenized, taking into account the effects of non-local equilibrium abundances of (3)He. The results for the neutrino flux and helioseismic predictions are far from satisifactory, but such models have the potential to reduce the predicted (7)Be/(8)B neutrino flux ratio, and further studies are warranted. Finally, we discuss how much the neutrino problem can be alleviated in the framework of the standard solar model by using reaction rates, abundances and neutrino capture cross-sections at the limits of their uncertainties, while still satisfying the constraints of helipseismology.