Computer Science – Sound
Scientific paper
Mar 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mnras.267..297r&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 267, no. 2, p. 297-302
Computer Science
Sound
56
Born Approximation, Buoyancy, Seismology, Sound Waves, Stellar Interiors, Stellar Mass, Stellar Oscillations, Astronomical Models, Gravitational Effects, Phase Shift, Standing Waves, Stellar Temperature
Scientific paper
We present a new theoretical description of the 'small frequency separations' delta omegal, n = omegal, n - omegal + 2, n - 1 for high-frequency stellar p-modes of low degree, these separations being the observable quantities that are primarily sensitive to the structure of the deep stellar interior. The description is based on an integral representation of the phase shift of acoustic waves due to scattering off the stellar core, taking into account the effects of buoyancy and gravitational perturbations. The accuracy of the theoretical description is tested by comparing the predicted frequency separations with values determined by numerically solving the full set of eigenfrequency equations for a standard solar model and for simple zero-age and evolved models of a 3-solar mass main-sequence star with a convective core.
Roxburgh Ian W.
Vorontsov Sergei V.
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