Three-colour photoelectric photometry of PLEIONE during the shell episode in 1971-1986.
Abstract
The results of UBV photoelectric observations of Pleione (BU Tau) during the shell episode in 1971 - 1986 are presented. The beginning of shell episode was found photometrically in autumn 1971, before its spectroscopic discovery. Total amplitude of brightness variation reached ΔU = 0m.60, ΔB = 0m.43 and ΔV = 0m.35. Variations of B-V were small. The U-B colour varied from -0m.36 to +0m.02 in the maximum and minimum of brightness. Displacement of the star on the two-colour plot (U-B) - (B-V) may be connected mainly with the increase of absorption in the Balmer continuum during the shell episode.
- Publication:
-
Astronomicheskii Zhurnal
- Pub Date:
- June 1988
- Bibcode:
- 1988AZh....65..593S
- Keywords:
-
- Astronomical Photometry;
- Balmer Series;
- Stellar Mass Ejection;
- Ubv Spectra;
- Variable Stars;
- Astronomical Spectroscopy;
- Electrophotometers;
- Line Spectra;
- Stellar Color;
- Stellar Rotation;
- Astrophysics