Application of solar seismology to study of the convection zone

Details Application of solar seismology to study of the convection zone Application of solar seismology to study of the convection zone

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990uat..reptq....h&link_type=abstract

Final Technical Report, 1 Jan. 1987 - 31 Dec. 1989 Arizona Univ., Tucson. Dept. of Physics.

Physics

Helioseismology, Neutrinos, Oscillations, Solar Cycles, Solar Physics, Solar Radiation, Sun, Acoustic Velocity, Constraints, Convection, Flux (Rate), Frequencies, Molecular Weight, Radii

Scientific paper

Progress has been made in the program to use solar seismology as a tool for understanding, and potentially, forecasting solar variability. Changes in the velocity of sound profile and nonadiabatic effects in the internal equilibrium condition of the convection zone over a six year period have been inferred from observed changes in the frequencies of low-order acoustic moses and intermediate degree f-modes. These changes may be associated with the eleven year solar cycle. The observed spectrum of gravity-modes has been used to infer a discontinuity in the mean molecular weight in the Sun's core and to place an upper limit on the density of WIMPS (Weakly Interacting Massive Particles) proposed to explain the solar neutrino paradox. The interred upper limit, if confirmed in future work removes the WIMPS proposal as a viable option. Evidence for gravity-mode coupling has been extended from 4 multiplets to 20. This evidence for mode coupling leads to interesting predictions concerning the solar neutrino flux. New differential radius observations were obtained in 1988 and 1989.

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