Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.233..565k&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 233, Aug. 1, 1988, p. 565-572. Research supported by th
Astronomy and Astrophysics
Astronomy
9
Cool Stars, Frequency Analyzers, Magnetic Stars, Scintillation, Stellar Oscillations, Stellar Spectrophotometry, Asymptotic Properties, High Resolution, Light Curve, Signal To Noise Ratios
Scientific paper
New high-speed photometric observations of the rapidly oscillating Ap star HD 203932 obtained with the 1-m telescope of the South African Astronomical Observatory are presented. These observations show that HD 203932 pulsates with at least three frequencies near 2.8 mHz which may not be associated with consecutive overtones. This analysis indicates possible values for the first and second order terms in the high-overtone, p-mode asymptotic relation, which ultimately should allow the determination of both mass and age. The new observations confirm that the major noise source at 2.8 mHz is scintillation which can be reduced by observing with larger telescopes. The frequency analysis of the light variations of HD 203932 suffers from 1/day alias ambiguities.
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