Active Phases on II Peg

  • P. Panagi
  • J. G. Doyle
Contributed Papers on Active Binary Stars
Part of the Lecture Notes in Physics book series (LNP, volume 291)


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.


Light Curve Line Flux Photometric Data Spot Group Phase Interval 
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Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • P. Panagi
    • 1
  • J. G. Doyle
    • 1
  1. 1.Armagh ObservatoryArmaghN. Ireland

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