Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.205...11k&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 205, Oct. 1983, p. 11-22.
Astronomy and Astrophysics
Astronomy
34
A Stars, Frequency Distribution, Magnetic Stars, Peculiar Stars, Stellar Oscillations, Variable Stars, Light Curve, Pulse Amplitude, Stellar Spectrophotometry
Scientific paper
High speed photometric observations of HR 1217 have been obtained during 119 hr on 18 nights in 1981. On five of those nights, contemporaneous observations were obtained at the South African Astronomical Observatory and Cerro Tololo Inter-American Observatory which greatly reduce the severe daily aliasing problem in the frequency analysis of this star. A frequency analysis of three nights of data at the phase of pulsation amplitude maximum reveals six nearly uniformly spaced frequencies which are thought to be associated with six consecutive overtones of pulsation. From the frequency ratios, the overtones of the pulsations are estimated at 76 to 81. Pulsation amplitude maximum coincides with magnetic maximum again for these data which, with previous data obtained in 1980 for this star, sets an upper limit of Ck, l at less than or equal to 0.002 at the 3-sigma level of confidence.
Kurtz Don W.
Seeman John
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