Active Close Binaries pp 545-549 | Cite as
Similarities and Differences Between the Light Variability of the K Giant and Dwarf Active Binaries HK Lac and BY Dra
Chapter
Abstract
The long term light and color (B-V, U-B) variations of BY Dra and HK Lac are discussed. Cyclic behaviour of the visual and U-B color variation of HK Lac has been found with a period of 5.4 years, showing 0.3 phase shift between the V(mean) and U-B cycles. A possible explanation of the feature is given.
Keywords
Color Variation Cyclic Behaviour Spot Activity Chromospheric Activity Poster Paper
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
Preview
Unable to display preview. Download preview PDF.
References
- Dorren, J.D., Guinan, E.F., 1989, Astrophys. J., in press.Google Scholar
- Olah, K., 1989, Proc. IAU Coll. No. 104 (Solar and Stellar Flares, ed. by B.M. Haisch and M. Rodono), Poster Papers, Catania Special Publ, p. 135.Google Scholar
- Olah, K., Hall, D.S., 1988, Comm. Konkoly Observatory, No. 91 (Vol. 10, Part 5), p. 121.Google Scholar
- Poe, C.H., Eaton, J.A., 1985, Astrophys. J. 289. 644.ADSCrossRefGoogle Scholar
- Strassmeier, K.G., Hall, D.S., Zeilik, M., Nelson, E., Eker, Z., Fekel, F.C., 1988, Astron. Astrophys. Suppl. 72. 291.ADSGoogle Scholar
- Vogt, S.S., Fekel, F., 1979, Astrophys. J. 234. 958.ADSCrossRefGoogle Scholar
Copyright information
© Kluwer Academic Publishers 1990