The BVJK Lightcurves of the Shortperiod Eclipsing Binary Cg-Cygni

Details The BVJK Lightcurves of the Shortperiod Eclipsing Binary Cg-Cygni The BVJK Lightcurves of the Shortperiod Eclipsing Binary Cg-Cygni

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...182..264b&link_type=abstract

Astronomy and Astrophysics, Vol.182, NO.2/AUG(II), P. 264, 1987

Astronomy and Astrophysics

Astrophysics

14

Scientific paper

BVJK light curves of CG Cygni show an apparent infrared excess < 0.2 mag out of eclipse, assuming the spectral types of the components to be G9.5V + K3V. The depths of the eclipses also show an excess equal (within the errors) to that at quadrature. The source of these excesses is most probably a circum-system shell of cool material; it cannot be material at the inner Lagrangian point. A subsidiary third minimum is present in at least the J light curve; it suggests the presence of material localised in the orbital plane, but not at the Lagrangian point.

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