Least-squares adjustment of SPOT parameters for three RS CVn binaries

Details Least-squares adjustment of SPOT parameters for three RS CVn binaries Least-squares adjustment of SPOT parameters for three RS CVn binaries

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....97..848k&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 97, March 1989, p. 848-865.

Astronomy and Astrophysics

Astronomy

50

Eclipsing Binary Stars, Least Squares Method, Light Curve, Starspots, Astronomical Models, Brightness Distribution, Stellar Evolution

Scientific paper

The light curves for three RS CVn-type binaries are analyzed according to the least-squares criterion, focusing on starspot parameters. A physical model including the proximity effects due to tides, irradiation, and spots is used. For each of the binaries, a fairly steady change in spot longitude with time is observed. The spot migration periods are shown to be about 9.4, 10, and 7.6 yr for RS CVn, AR Lac, and V711 Tau, respectively. It is suggested that the wave advances for V711 Tau, because the low orbital inclination causes the relatively slowly rotating high-latitude spot regions to dominate the distortion wave.

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