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Title:
Our sun. I - The standard model: Successes and failures
Authors:
Sackmann, I.-Juliana; Boothroyd, Arnold I.; Fowler, William A.
Affiliation:
AA(California Institute of Technology, Pasadena), AB(California Institute of Technology, Pasadena), AC(California Institute of Technology, Pasadena)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 360, Sept. 10, 1990, p. 727-736. Research supported by the California Institute of Technology and University of Toronto. (ApJ Homepage)
Publication Date:
09/1990
Category:
Solar Physics
Origin:
STI
NASA/STI Keywords:
SOLAR INTERIOR, STELLAR MODELS, SUN, ABUNDANCE, HELIUM, METALLICITY, NUCLEAR FUSION, SOLAR NEUTRINOS
DOI:
10.1086/169158
Bibliographic Code:
1990ApJ...360..727S

Abstract

The results of computing a number of standard solar models are reported. A presolar helium content of Y = 0.278 is obtained, and a Cl-37 capture rate of 7.7 SNUs, consistently several times the observed rate of 2.1 SNUs, is determined. Thus, the solar neutrino problem remains. The solar Z value is determined primarily by the observed Z/X ratio and is affected very little by differences in solar models. Even large changes in the low-temperature molecular opacities have no effect on Y, nor even on conditions at the base of the convective envelope. Large molecular opacities do cause a large increase in the mixing-length parameter alpha but do not cause the convective envelope to reach deeper. The temperature remains too low for lithium burning, and there is no surface lithium depletion; thus, the lithium problem of the standard solar model remains.

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