Mode selection and other nonlinear phenomena in stellar oscillations

Details Mode selection and other nonlinear phenomena in stellar oscillations Mode selection and other nonlinear phenomena in stellar oscillations

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aspc...40..521d&link_type=abstract

In: Inside the stars; Proceedings of the 137th IAU Colloquium, Univ. of Vienna, Austria, Apr. 13-18, 1992 (A93-53126 23-90), p.

Statistics

Computation

10

Computational Astrophysics, Stellar Oscillations, Stellar Physics, A Stars, Cepheid Variables, Coupled Modes, Peculiar Stars, Stellar Spectra, White Dwarf Stars

Scientific paper

Nonlinear effects determining the amplitudes of unstable modes of oscillations in stellar modes are reviewed. The two basic processes - saturation of the driving mechanism and resonant mode coupling - are discussed within the framework of the amplitude equation formalism. There are difficult problems in the theory of multiple mode interaction that must be solved to make a prediction of amplitude spectra possible. The observed spectra for Delta Scu stars and other multiperiodic variables exhibit no simple pattern that would suggest a solution of the theoretical problems.

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