TOWARD A UNIFIED CLASSICAL-MODEL OF THE SUN - ON THE SENSITIVITY OF NEUTRINOS AND HELIOSEISMOLOGY TO THE MICROSCOPIC PHYSICS

This paper focuses mainly on the neutrino puzzle and discusses the poi nt of view that neutrinos and helioseismology are two complementary pr obes of the solar interior. We first analyze the physical differences noticed between already published solar models and their consequences for neutrino predictions. Including improvements achieved in microscop ic physics these last 3 years, we propose new results on the solar neu trino predictions and acoustic mode frequencies for l = 0-150, in the classical framework of stellar evolution. Doing so, we quantify the in fluence of precise composition, nuclear reaction rates, screening effe ct, and opacity calculations on both neutrino and acoustic mode freque ncy predictions. Our present predictions are 6.4 +/- 1.4 SNU for the c hlorine experiment, 4.4 +/- 1.1 x 10(6) cm-2 s-1 for the water detecto r, and 122.5 +/- 7 SNU for the gallium detector. Considering that the present experimental situation may support the hypothesis that neutrin os and helioseismology are both representative of the Sun, we then try to derive from the sound speed behavior an estimate of how the neutri no predictions may progress, including phenomena not yet simulated at present; we suggest that a correct description of the region located b etween the nuclear region and the convective zone justifies an increas e of the B-8 neutrino prediction by no more than 10%-15%, and that the nuclear reaction rates of the p-p chain should be revisited.