Physics
Scientific paper
Oct 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980cait.rept.....g&link_type=abstract
Final Report, 1 Oct. 1976 - 30 Sep. 1980 California Inst. of Tech., Pasadena. Div. of Geology and Planetary Sciences.
Physics
Amplitudes, Convection Currents, Mixing Length Flow Theory, Power Spectra, Solar Oscillations, Dissipation, Eigenvectors, Excitation, Solar Granulation, Spherical Harmonics, Turbulent Mixing
Scientific paper
Possible sources for the excitation of the solar 5 minute oscillations were investigated and a linear non-adiabatic stability code was applied to a preliminary study of the solar g-modes with periods near 160 minutes. Although no definitive conclusions concerning the excitation of these modes were reached, the excitation of the 5 minute oscillations by turbulent stresses in the convection zone remains a viable possibility. Theoretical calculations do not offer much support for the identification of the 160 minute global solar oscillation (reported by several independent observers) as a solar g-mode. A significant advance was made in attempting to reconcile mixing-length theory with the results of the calculations of linearly unstable normal modes. Calculations show that in a convective envelope prepared according to mixing length theory, the only linearly unstable modes are those which correspond to the turbulent eddies which are the basic element of the heuristic mixing length theory.
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