Asymptotic theory of intermediate- and high-degree solar acoustic oscillations

Details Asymptotic theory of intermediate- and high-degree solar acoustic oscillations Asymptotic theory of intermediate- and high-degree solar acoustic oscillations

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...409..455b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 409, no. 1, p. 455-464.

Astronomy and Astrophysics

Astrophysics

21

Asymptotic Methods, Stellar Oscillations, Adiabatic Conditions, Boundary Conditions, Brunt-Vaisala Frequency, Phase Shift, Wentzel-Kramer-Brillouin Method

Scientific paper

A second-order asymptotic approximation is developed for adiabatic nonradial p-modes of a spherically symmetric star. The exact solutions of adiabatic oscillations are assumed in the outermost layers, where the asymptotic description becomes invalid, which results in a eigenfrequency equation with model-dependent surface phase shift. For lower degree modes, the phase shift is a function of frequency alone; for high-degree modes, its dependence on the degree is explicitly taken into account.

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