The interacting early-type binary V382 Cyg

Abstract

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·, M·2= 20.8(4) M·, R1= 9.7(2) R·, R 2= 8.5(2) R·, log (L 1/L ·) = 5.152(20), and log (L 2/L·) = 4.954(19) while the separation of the components is a= 23.4 R ·. 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) × 10-7daysyr-1 that can be interpreted in terms of the high-mass transfer (dM/dt = 6.1(5) × 10 -6 M·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 3.85Myr. © 2013. The American Astronomical Society. All rights reserved.