Astronomy and Astrophysics – Astronomy
Scientific paper
May 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aj....109.2169h&link_type=abstract
Astronomical Journal v.109, p.2169
Astronomy and Astrophysics
Astronomy
16
Binaries: Eclipsing, Binaries: Close, Stars: Chromospheres
Scientific paper
Using all data available to us, we model the long term spot activity of three eclipsing RS CVn stars with periods between four and eight days: RS CVn, MM Her, and SS Boo. We use the Information Limit Optimization Technique of Budding and Zeilik (1987) to model the spot longitude, latitude, and radius for each available light curve. Contrary to the case for short (<1 day) period RS CVns, the spots seem to occur at all possible longitudes rather than in fixed active longitude belts. We also find spots at both high and low latitudes. We examine possible long term trends in the evolution of the spot activity, including both the total area covered by spots and spot migration patterns. For the best light curves, we remove the spot effects to find clean fits for binary star parameters.
Heckert Paul A.
Ordway James I.
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