Statistics – Computation
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.259..701k&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 259, no. 4, p. 701-708.
Statistics
Computation
31
A Stars, Peculiar Stars, Spherical Harmonics, Stellar Oscillations, Stellar Rotation, Computational Astrophysics, Stellar Models, Vibration Mode
Scientific paper
Several of the rapidly oscillating Ap stars have frequency spectra which show frequency triplets split exactly equally by the rotation frequency of the star. Recently, one of these stars, HR 3831, has been found to have an equally split frequency septuplet. None of those frequency multiplets can be described adequately by a single spherical harmonic pulsation mode. In this paper a method is presented for modeling the observed frequency spectrum of a rapidly oscillating Ap star as a sum of axisymmetric spherical harmonics of low degree within the assumptions of the oblique pulsator model. It is shown that such a sum with l not greater than 3 is sufficient to describe the observations.
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