V375 Cas: THE BETA LYR TYPE ECLIPSING BINARY SYSTEM WITH A POSSIBLE THIRD COMPONENT

Abstract

A detailed analysis study was carried out to examine the period change of the Beta Lyr type eclipsing binary star V375 Cas, and the first results are presented in the perent study. In the analysis, the published eclipsing times of the system were used together with the minimum times derived from the BVR light curves obtained by photometric observations made in ÇOMUO and the TESS archival data. The distribution of O-C residuals can be represented by a sinusoidal structure superimposed on the upward parabola. Accordingly, the increase rate of the orbital period was determined as 0.052(1) s/yr and the mass transfer rate (from the less massive component to the more massive one) was +5.64x10-7 Msun/yr. The minimum mass of the third component responsible for the periodic change was found to be 2.85(40) Msun. In addition, the contribution of the third component to the total light was investigated by modeling the BVR light curves with the MC algorithm. Accordingly, the third light contribution was found to be 5% in the B filter, 8% in the V filter and 9% in the R filter.