URL: https://www.desy.de/news/events/index_eng.html/@@events-view
Breadcrumb Navigation
24.06.2021 / 15:00 - 16:30 / Hamburg, online, zoom
Astroparticle PhysicsThe physics of the Sun and solar neutrinos
Francesco Villante (Università dell'Aquila and INFN-LNGS)
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. Connection details at: https://indico.desy.de/event/29780/
