Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...300..348m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 300, Jan. 1, 1986, p. 348-359. NSERC-supported research.
Astronomy and Astrophysics
Astrophysics
20
A Stars, Cool Stars, Peculiar Stars, Stellar Oscillations, Stellar Rotation, Amplitude Distribution Analysis, Light Curve, Spectrum Analysis, Stellar Spectrophotometry
Scientific paper
It is pointed out that the rapidly oscillating Ap stars are cool Ap stars which exhibit broad-band light variations with periods in the range of 4-15 minutes. Kurtz (1982) has proposed the 'oblique pulsator' model which explains partly the modulation of the oscillation, and the fine structure of the frequency spectra. Only 10 rapid oscillators are known at present. The present paper is concerned with one of the most recent additions to the class, HD 60435. Kurtz (1984) observed oscillations with periods near 12 and 6 minutes, and dramatic amplitude modulation from night to night. However, the data were not adequate for a thorough study of the frequencies present and their modulation. In the context of the present study, observations were obtained from two sites spaced widely in longitude to obtain longer nightly coverage of the light curve. A frequency analysis is conducted and the results are evaluated.
Kurtz Don W.
Matthews Jaymie M.
Wehlau William H.
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