ROTSE1 J164341.65+251748.1: A new W UMa-type eclipsing binary

Abstract: ROTSE1 J164341.65+251748.1 was photometrically observed in the V band during three epochs with the 0.84-m telescope of the San Pedro Mártir Observatory in Mexico. Based on additional BVR photometry, we found that the primary star has a spectral type around G0V. The light curve of the system is typical of a W UMa type binary stars and has an orbital period of ≈ 0.323 days. In an effort to gain a better understanding of the binary system and determine its physical properties, we analyzed the light curve with the Wilson and Devinney method. We found that ROTSE1 J164341.65+251748.1 has a mass ratio of ≈ 0.34 and that the less massive component is about 230 K hotter than the primary star. The inclination of the system is ≈ 84.6 degrees, and the degree of over-contact is 11%. The analysis shows the presence of variable bright spots on the primary star.

Bibliographic Details

Main Authors:	Michel,R., Echevarría,J., Cang,T.Q., Fox-Machado,L., González-Buitrago,D.
Format:	Digital revista
Language:	English
Published:	Universidad Nacional Autónoma de México, Instituto de Astronomía 2016
Online Access:	http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0185-11012016000200339
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