Statistics – Computation
Scientific paper
Feb 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...367..658m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 367, Feb. 1, 1991, p. 658-665. Research supported by SERC.
Statistics
Computation
9
Astronomical Models, Helium Isotopes, Nonlinearity, Solar Gravitation, Solar Interior, Compressibility, Computational Astrophysics, Coupled Modes, Radiative Transfer, Solar Oscillations, Stellar Models
Scientific paper
The nonlinear behavior of gravity-mode oscillations driven by He-3-destroying reactions in the solar core has been examined by numerically integrating equations describing a very simplified model. The results of a previous bifurcation analysis, which suggest that such oscillations are unlikely to attain amplitudes sufficient to trigger core convection, are verified. These results are extended to models whose nuclear reaction rates and thermal stratification represent the core somewhat more accurately. Nonlinear processes give rise to a preference for the oscillations to develop as standing waves rather than traveling waves, thus breaking the degeneracy between these two types of motion which exists in linearized theory. Study of the large-amplitude behavior of the oscillations is hindered by a tendency for the model to become thermally unstable.
Gough Douglas
Merryfield William J.
Toomre Juri
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