SOLAR MODELING AND THE NEUTRINO PUZZLE - THE ASTROPHYSICAL POINT-OF-VIEW

After short comments on the neutrino puzzle and the energy balance, I shall discuss the impact of the improved ingredients of the solar modelling on the solar structure, the predicted neutrino fluxes and the acoustic frequencies determination. Progresses in the understanding of the acoustic frequencies are clear and reinforce the idea that the classical framework is justified, as a first approximation. Regarding the neutrino problem, even if each modification has some impact on different neutrino sources, altogether, they only slightly reduce the present discrepancy, so we conclude that the main source of the discrepancy is not yet discovered. As far as there is no clear disagreement between the different experiments, I suggest directions of investigations for the near future concerning the nuclear region where the nuclear reaction rates must be revisited and concerning phenomena not yet included in solar modelling.