Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.228..125k&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 228, Sept. 1, 1987, p. 125-139. Research supported by t
Astronomy and Astrophysics
Astronomy
24
A Stars, Cool Stars, Radiant Flux Density, Resonant Frequencies, Stellar Oscillations, Stellar Spectra, Magnetic Stars, Spectral Energy Distribution, Stellar Spectrophotometry
Scientific paper
A frequency analysis of 90 hr of high-speed photometric data of the Ap star HD 6532 obtained in 1985 shows the presence of three principal frequencies (f1 = 2.396212 + or - 0.000002 mHz, f2 = 2.402164 + or - 0.000002 mHz, and f3 = 2.408116 + or - 0.000003 mHz) which are equally spaced by 5.952 + or - 0.004 microHz. No further evidence of the 1.17 mHz peak seen in the amplitude spectra of Kurtz and Kreidl (1985) in 1984 is found. The separations of the frequencies of the f123 frequency triplet are found to be equal to the rotation frequency derived by Kurtz and Marang (1987), and f123 is interpreted as an oblique dipole oscillation within the oblique pulsator model. Constraints are placed on some of the parameters of the oblique pulsator model, and the form and ephemeris of as-yet unobserved magnetic variations are predicted.
Cropper Mark S.
Kurtz Don W.
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