Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.216..987k&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 216, Oct. 15, 1985, p. 987-999. Research supported by t
Astronomy and Astrophysics
Astronomy
14
A Stars, Frequency Distribution, Peculiar Stars, Stellar Oscillations, Amplitude Distribution Analysis, Light Curve, Phase Shift, Stellar Rotation
Scientific paper
The authors have discovered rapid oscillations in the Ap star, HD 6532. A frequency analysis of 44 hr of observations obtained on 10 nights in 1984 from both CTIO and SAAO is presented. A frequency triplet is found with periods near 6.94 min which does not appear to be equally spaced. Aliasing problems prevent any definitive conclusion, however. The authors also claim to have detected a 14.28-min oscillation on two nights, although this needs confirmation. HD 6532 shows mean light variations with a period of 0.8929 day. Based on plausibility arguments about the rotational velocity of Ap stars, it is suggested that the rotational period of HD 6532 is Prot = 1.7858 day so that it shows a double wave mean light curve. This implies that it should show a polarity reversing magnetic field.
Kreidl Tobias J.
Kurtz Don W.
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