A note concerning the pulsations of AP stars

Details A note concerning the pulsations of AP stars A note concerning the pulsations of AP stars

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.256p..11g&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 256, no. 1, May 1, 1992, p. 11P-14P.

Astronomy and Astrophysics

Astronomy

3

A Stars, Stellar Oscillations, Time Series Analysis, Eigenvalues, Schroedinger Equation, Stellar Atmospheres, Stellar Models, Wentzel-Kramer-Brillouin Method

Scientific paper

Observations of oscillations of Ap stars show frequencies above the acoustic cut-off frequency in the atmosphere. Time-series analysis reveals several discrete eigenfrequencies to be present in the observational data and not a continuum of modes of different frequencies. Theoretically a discrete eigenspectrum can exist also for frequencies above the cut-off frequencies. Numerical calculations are presented demonstrating the discreteness of the eigensolutions and the development of the damping rate due to wave leakage at the surface of the star.

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