THE INTERACTING EARLY-TYPE BINARY V382 Cyg

Abstract

We present photometric and spectroscopic data analysis and orbital period study of an early-type interacting binary system V382 Cyg by using all the available data. We made a simultaneous light and radial velocity curve solution. The derived physical parameters of the primary and secondary stellar components are $M_{1}$ = 27.9(5) $M_{\odot}$, $M_{2}$ = 20.8(4) $M_{\odot}$, $R_{1}$ = 9.7(2) $R_{\odot}$, $R_{2}$ = 8.5(2) $R_{\odot}$, $\log{(L_1/L_{\odot})} = 5.152(20)$ and $\log{(L_2/L_{\odot})} = 4.954(19)$ while the separation of the components is {\it a} = 23.4 $R_{\odot}$. Newly obtained parameters yield the distance of the system as 1466(76) pc. Analyses of the mid-eclipse times indicate a period increase of $\frac{dP}{dt}=4.2(1)\times 10^{-7}$ days/yr that can be interpreted in terms of the high mass transfer ($\frac{dM}{dt}=6.1(5)\times 10^{-6}$ $M_{\odot}$/yr) from the less massive component to the more massive component. Finally we modelled the evolution of the components using nonconservative codes and discussed the obtained results. The age of the binary system is estimated as 3.85 Myr.