Astronomy and Astrophysics – Astronomy
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.226..187k&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 226, May 1, 1987, p. 187-193.
Astronomy and Astrophysics
Astronomy
14
A Stars, Light Curve, Magnetic Stars, Peculiar Stars, Stellar Oscillations, Variable Stars, Data Reduction, Spectrum Analysis
Scientific paper
We announce the discovery of low-amplitude light variations with periods between 8.8 and 9.1 min in the cool magnetic Ap star HD 166473. We present 51 hr of high-speed photometric observations obtained on eight nights in 1986 from the South African Astronomical Observatory. A frequency analysis of these observations shows that at least three frequencies are present in the light variations which we tentatively identify as f1 =1.891944mHz, f2 =1.823890 mHz and f3 =1.928169 mHz. These frequencies are not equally split and hence are not due to rotational amplitude modulation in an oblique pulsator. No unique mode identifications are possible, but an identification of f1, f2 and f3 with modes of (n=26,l=1), (n=25, l=1) and either (n=26, l=2) or (n=27, l=0), respectively, is consistent with first-order asymptotic theory and A star models.
Kurtz Don W.
Martinez Pablo
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