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

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

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989japa...10..139p&link_type=abstract

Journal of Astrophysics and Astronomy (ISSN 0250-6335), vol. 10, June 1989, p. 139-146.

Astronomy and Astrophysics

Astrophysics

6

Chromosphere, H Alpha Line, Stellar Activity, Ubv Spectra, Variable Stars, Astronomical Catalogs, Electrophotometry, Emission Spectra, Line Spectra, Radial Velocity

Scientific paper

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 + or - 0.06 d period has been found from the B and V magnitudes which is interpreted as the rotational modulation of the light from a nonuniformly spotted star. The amplitude of this spot wave is observed to vary slowly between Delta V of about 0.1 to 0.3 mag, which may be evidence for an activity cycle of 9 + or - 3 years.

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