The Sun represents a solid benchmark for stellar evolution and a
laboratory for standard and non-standard physics. The properties of solar
interior can be indeed predicted with high accuracy by the so-called
Standard Solar Model (SSM) and falsified by solar neutrino experiments
and by helioseismology.
Solar neutrino physics is entering the precision era. The detection of
neutrinos produced by pp-chain and CNO-cycle provide us fundamental
informations on the thermal stratification and on the chemical
composition of the solar core. These can be used to verify the
predictions of the SSM and to constrain standard and non/standard energy
generation and transfer mechanisms, standard and non/standard chemical
evolution paradigms for the Sun, etc.
The CNO neutrino measurements, combined with precise determinations of 8B
and 7Be fluxes, can also provide clues for the solution of the so-called
solar abundance problem, i.e. the fact that SSMs implementing the latest
determination of surface heavy element abundances, obtained by 3D
hydrodynamic models of the solar atmosphere, do not reproduce
helioseismic constraints. All proposed modifications to physical
processes in SSMs (e.g. anomalous diffusion, accretions, mass loss, etc)
offer, at best, only partial solutions to this unsolved puzzle.
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Meeting ID: 921 1801 0804
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