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Remarks on the Complicated Close Binary Systems RT Lacertae, CG Cygni, and RW Coronae Borealis

Published online by Cambridge University Press:  14 August 2015

E. F. Milone  and
S. A. Naftilan
E. F. Milone
Affiliation:
Rothney Astrophysical Observatory, The University of Calgary
S. A. Naftilan
Affiliation:
Rothney Astrophysical Observatory, The University of Calgary

Extract

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The three systems differ in period, scale and degree of contact: RW Com is a contact system, RT Lac is semi-detached and CG Cyg is a detached system. Yet they share the properties of a variable asymmetric light curve in the UBV, Ca II H and K emission, apparent infrared excesses, and period variability. If it may be argued that this ensemble of symptoms has similar origins in the different systems, then our intensive studies of these three binaries may have implications for the nature of all systems showing the RS CVn properties. We feel that the evidence points to the presence of circumstellar matter in the three binaries. We pose the questions: does this material create the photometric pecularities, is it incidental to them or does it arise from some other light-curve perturbing source?

Type
VII. The RS Canum Venaticorum Stars
Information
Symposium - International Astronomical Union , Volume 88: Close Binary Stars: Observations and Interpretation , 1980 , pp. 419 - 422
Copyright
Copyright © Reidel 1980 

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