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| Paper: |
The Magnetic Cycle of Kappa Ceti |
| Volume: |
27, The Solar Cycle: Proceedings of the National Solar Observatory/Sacramento Peak 12th Summer Workshop |
| Page: |
197 |
| Authors: |
Saar, S. H.; Baliunas, S. L. |
| Abstract: |
Observations of chromospheric Mg II and Ca II fluxes and photospheric magnetic flux (spanning 10, 22, and 6 years, respectively) of the active G5 dwarf, Kappa Ceti, show long-term variations analogous to the solar cycle. Ca II emission varies with a period of P_cyc = 5.6 yr, and we detect a decrease in magnetic flux (~ fB) during the declining phase of a recent cycle (1984-1988) of the form: Delta F_HK ~ (fB)^{0.4 +/- 0.2}. This is the first direct evidence for a magnetic cycle on a star other than the Sun. |
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