Frequency analysis of the 5.65-min oscillations in the rapidly oscillating AP star HD 134214

Details Frequency analysis of the 5.65-min oscillations in the rapidly oscillating AP star HD 134214 Frequency analysis of the 5.65-min oscillations in the rapidly oscillating AP star HD 134214

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.220..313k&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 220, May 15, 1986, p. 313-320. Research supported by th

Astronomy and Astrophysics

Astronomy

19

A Stars, Magnetic Stars, Peculiar Stars, Stellar Oscillations, Cool Stars, Frequencies, Light Curve, Phase Shift

Scientific paper

High-speed photometric observations of HD 134214 obtained during 35 hr of observation in 1985 from Lowell Observatory and the South African Astronomical Observatory are presented. A frequency analysis of these data indicate the presence of only one frequency of oscillation in this star at fl=2.94960 ± 0.00004 mHz (P=5.650 ± 0.001 min). This is the highest frequency which is demonstrably not a harmonic of a lower frequency yet discovered in a rapidly oscillating Ap star. This frequency is above the critical frequency calculated for A star models by Shibahashi & Saio. The phase shift Δ φ (V, B-V)= 19± 6° has been calculated for HD 134214 from simultaneous B and V observations obtained on three nights from Lowell Observatory. The interpretation of this phase shift is problematical. Mean B light observations of HD 134214 made at Lowell Observatory and the South African Astronomical Observatory give inconsistent results for the rotation period of HD 134214.

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