The discovery of 12.5-minute oscillations in the cool magnetic AP star, Gamma Equ

Details The discovery of 12.5-minute oscillations in the cool magnetic AP star, Gamma Equ The discovery of 12.5-minute oscillations in the cool magnetic AP star, Gamma Equ

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.202....1k&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 202, Jan. 1983, p. 1-10.

Astronomy and Astrophysics

Astronomy

38

A Stars, Magnetic Stars, Peculiar Stars, Stellar Oscillations, Astronomical Photometry, Light Curve, Time Response

Scientific paper

The author announces the discovery of oscillations with a period of 12.5 min in the cool magnetic Ap star γ Equ (HR 8097, HD 201601). He presents 36 hr of high speed photometric observations obtained on 11 nights during a time span of 98 days in 1981. It is suggested that further observations of the 12.5 min oscillation may yield the rotation period for γ Equ independently of the magnetic measurements. This in turn would discriminate between the oblique rotator and magnetic cycle explanations for the very slow magnetic variation in γ Equ.

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