Basic stellar parameter determination for active cool eclipsing binaries |
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| Authors: | E Budding C J Butler J G Doyle P B Etzel K Oláh M Zeilik D Brown |
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| Institution: | (1) Carter Observatory, P.O. Box 2909, Wellington, New Zealand;(2) Armagh Observatory, Armagh, N. Ireland;(3) Astronomy Department, San Diego State University, 92812 San Diego, CA, USA;(4) Konkoly Observatory, Hungarian Academy of Sciences, P.O. Box 67, 1525 Budapest, Hungary;(5) Institute for Astrophysics, Department of Physics and Astronomy, University of New Mexico, 87131 Albuquerque, NM, USA |
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| Abstract: | We examine procedures for the determination of reliable parameter sets characterizing stars in short period eclipsing binary systems of later dwarf, generally sunlike, spectral types. These stars have magnetodynamically active components and form a useful  extension to the solar laboratory . Their much more rapid rotation than that of the Sun implies correspondingly enhanced indications of activity-particularly with relatively large maculation effects in broadband data.We concentrate on five such systems, for which we discuss new data and analyses-CG Cyg, ER Vul, YY Gem, BH Vir and UV Psc. Our main aim is to enable more reliable absolute comparisons between the basic properties of such stars and the Sun. Some indications of the ages of these binaries can also provide further pointers to the relative importance of different parameters (e.g. rotation, age, etc.), in determining stellar activity.This article originally appeared as Poster JD12 G42 at the 22nd General Assembly of the IAU, The Hague (van Woerden, 1994). |
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