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T: Fachverband Teilchenphysik

T 107: Invited Overview Talks V

T 107.3: Invited Overview Talk

Freitag, 20. März 2026, 12:00–12:30, AudiMax

Overview of the solar model and LUNANOVA — •Daniel Bemmerer — Helmholtz-Zentrum Dresden-Rossendorf (HZDR)

The standard solar model describes the physics of the solar interior. Input parameters include the solar elemental composition, the total energy radiated from the sun, and microphysics such as nuclear reactions and radiation transport. The model can be validated observing the fluxes of neutrinos produced in the solar core and the sound waves at the solar surface. There were two main challenges to the model. First, the solar neutrino problem, which was solved by the discovery of neutrino flavour oscillations. Second, the solar abundance puzzle, caused by discrepant data on the solar composition. In order to solve this puzzle, we will build a new laboratory, LUNANOVA, and measure the rates of several neutrino-producing reactions in the sun. The new data will break the degeneracy between abundances and radiation transport, enable to use the sun as a calibrated particle source, and decisively improve the models of solar-like stars in general.