Photometric Study and Physical Parameters of a Contact Eclipsing Binary System V1799 Orionis

Abstract

In this research, we study the photometric and physical parameters of a contact eclipsing binary system V1799 Orionis. This work used the 0.5 meter reflecting telescope with CCD photometric system in blue, visual and infrared bands. The photometric data were obtained in December 28-29, 2015 and January 8, 2016 at the Thai National Observatory, Chiang Mai. The light curves and physical parameters were analyzed simultaneously using PHOEBE. The results show that the effective temperature of the primary and secondary star, the inclination and the mass ratio were 5000.00 K, 4849.58 K, 89.696^o and 1.377, respectively. The degree of contact was calculated to be 5.146%. The mass transfer rate was 4.9x10^-8 solar masses per year, and the period increased to 1.9 x 10^-8 day per year. The evolutionary status of the primary and secondary components is that they are moving away from the center of mass of the binary system, in accord with the Thermal Relaxation Oscillation Theory.