Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-02-16
Phys.Rev.D60:123002,1999
Astronomy and Astrophysics
Astrophysics
15 pages in ReVTeX (tighten) and 3 postscript figures; version to appear in Phys. Rev. D (a few references and comments added)
Scientific paper
10.1103/PhysRevD.60.123002
The He3 abundance is not constrained by helioseismic data. Mixing of He3 inside the solar core by processes not included in the solar standard model (SSM) has been recently proposed as possible solution to the solar neutrino problem. We have performed a model independent analysis of solar neutrino fluxes using practically arbitrary He3 mixing. In addition, we have been simultaneously varying within very wide ranges the temperature in the neutrino production zone and the astrophysical factors, S17 and S34, of the p+Be7 and He3+He4 cross sections. Seismic data are used as constraints, but the solar- luminosity constraint is not imposed. It is demonstrated that even allowing He3 abundances higher by factors up to 16 than in the SSM, temperatures 5% (or more) lower, the astrophysical factor S17 up to 40% higher, and varying S34 in the range (-20% ,+40%), the best fit is still more than 5 sigmas away from the observed fluxes. We conclude that practically arbitrary He3 mixing combined with independent variations of temperature and cross-sections cannot explain the observed solar neutrino fluxes.
Berezinsky Veniamin
Fiorentini Gianni
Lissia Marcello
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