THE INTERACTING EARLY-TYPE BINARY V382 Cyg

We analyze photometric and spectroscopic data and study the orbital period of the early-type interacting binary system V382 Cyg by using all the available data. We obtain 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-circle dot, M-2 = 20.8(4) M-circle dot, R-1 = 9.7(2) R-circle dot, R-2 = 8.5(2) R-circle dot, log(L-1/L-circle dot) = 5.152(20), and log (L-2/L-circle dot) = 4.954(19) while the separation of the components is a = 23.4 R-circle dot. Newly obtained parameters yield the distance of the system to be 1466(76) pc. Analyses of the mid-eclipse times indicate a period increase of dP/dt = 4.2(1) x 10(-7) days yr(-1) that can be interpreted in terms of the high-mass transfer (dM/dt = 6.1(5) x 10(-6) M-circle dot yr(-1)) from the less massive component to the more massive component. Finally, we model the evolution of the components using non-conservative codes and discuss the results obtained. The age of the binary system is estimated to be 3.85 Myr.