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CF octantis, an RS CVn-type variable with a prominent activity cycle

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Abstract

Photoelectric photometry has been obtained for CF Octantis on 39 nights. The object is a member of the RS CVn class and has a highly active chromosphere. A 20.15 ±0.06 d period has been found from theB andV magnitudes, which is interpreted as the rotational modulation of the light from a non-uniformly spotted star. The amplitude of this spot wave is observed to vary slowly between ΔV about 0m.l and 0m.3, which may be evidence for an activity cycle of 9 ±3 years.

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Authors and Affiliations

  1. Mt John University Observatory, Department of Physics, University of Canterbury, Christchurch, 1, New Zealand

    K. R. Pollard, J. B. Hearnshaw, A. C. Gilmore & P. M. Kilmartin

Authors
  1. K. R. Pollard
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  2. J. B. Hearnshaw
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  3. A. C. Gilmore
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  4. P. M. Kilmartin
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Pollard, K.R., Hearnshaw, J.B., Gilmore, A.C. et al. CF octantis, an RS CVn-type variable with a prominent activity cycle. J Astrophys Astron 10, 139–146 (1989). https://doi.org/10.1007/BF02719309

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  • DOI: https://doi.org/10.1007/BF02719309

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