Is KR Cygni a triple star system?

Details Is KR Cygni a triple star system? Is KR Cygni a triple star system?

May 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012newa...17..383s&link_type=abstract

New Astronomy, Volume 17, Issue 4, p. 383-387.

Astronomy and Astrophysics

Astronomy

Scientific paper

New multi-colour UBVR light curves of the eclipsing binary KR Cyg were obtained in 2005. Photometric solutions were derived using the Wilson-Devinney method. The result shows that KR Cyg is a near-contact binary system with a large effective temperature difference between the components, approximately 5230 K. All the times of minimum light were collected and combined with our observations obtained in 2010 and 2011. Analysing all the times of mid-eclipse, we found for the first time a possible periodic oscillation with an amplitude of 0.001 days and a period of ˜76 years. The periodic oscillation could be explained by the light-time effect due to a presumed third component.

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