Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...256..463b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 256, no. 2, p. 463-476.
Astronomy and Astrophysics
Astrophysics
10
Eclipsing Binary Stars, Starspots, Stellar Envelopes, Stellar Evolution, Stellar Spectrophotometry, Iue, Main Sequence Stars, Red Giant Stars, Stellar Luminosity, Stellar Rotation, Stellar Temperature
Scientific paper
Results are presented of monitoring of the RS CVn-type eclipsing binary RZ Eridani, observed in the seven colors of the Geneva photometric system between November 1977 and April 1989. It is shown that the primary is an A8-F0IV star, which was stable during the 12 years of the survey. The secondary component, a G8-K0IV-III star, exhibits three kinds of stellar variability: a starspot effect with a period of about 35 d (stellar rotation), varying from year to year; a reflection effect of the light from the primary component, with a period equal to the orbital one (the orbital period); and a long-term variability, tentatively attributed to be due to a stellar activity cycle.
Burki Gilbert
Kviz Zdenek
North Pierre
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