Active Phases on II Peg
Abstract
Analysis of HE data for 1981, 1983 and 1985 II Peg show evidence of a long-lived plage region in Mg II k, C IV and He II. This UV enhancement is in anti-correlation with the maximum spot visibility and would imply a hot plage region overlying the cool photospheric spot. The optical spot migration rate from late 1981 to early 1986 was only 0.03 rotations per year.
- Publication:
-
Cool Stars, Stellar Systems and the Sun
- Pub Date:
- 1987
- DOI:
- 10.1007/3-540-18653-0_180
- Bibcode:
- 1987LNP...291..488P