The discovery of 12.5-minute oscillations in the cool magnetic AP star, gamma Equ.
Abstract
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.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- January 1983
- DOI:
- 10.1093/mnras/202.1.1
- Bibcode:
- 1983MNRAS.202....1K
- Keywords:
-
- A Stars;
- Magnetic Stars;
- Peculiar Stars;
- Stellar Oscillations;
- Astronomical Photometry;
- Light Curve;
- Time Response;
- Astrophysics