Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apj...709l...1v&link_type=abstract
The Astrophysical Journal Letters, Volume 709, Issue 1, pp. L1-L5 (2010).
Astronomy and Astrophysics
Astronomy
11
Methods: Data Analysis, Neutrinos, Sun: Activity, Sun: Particle Emission
Scientific paper
Using some solar activity indicators such as sunspot areas and green-line coronal emission during the period 1974-2001, we find that the quasi-biennial periodicity is a fundamental mode of solar variability. We provide evidence for the quasi-biennial modulation of the solar neutrino flux, thus supporting the hypothesis of a connection between solar neutrinos and solar magnetic fields, probably through direct interaction with the neutrino magnetic moment. The same periodic modulation has been detected when fluxes of solar energetic protons and galactic cosmic rays are investigated. These modulation results significantly correlate to that of the neutrino flux. Finally, the superposition of the quasi-biennial cycle to the eleven-year cycle can explain the Gnevyshev Gap phenomenon.
Carbone Vincenzo
Laurenza Monica
Storini Marisa
Vecchio Alberto
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