The Interacting Early-Type Binary V382 Cyg

TL;DR

This study analyzes the physical parameters, orbital period changes, and evolutionary status of the early-type interacting binary V382 Cyg using photometric, spectroscopic, and modeling data.

Contribution

It provides a comprehensive analysis of V382 Cyg's physical parameters, period variation, and evolutionary modeling, offering new insights into its mass transfer and age.

Findings

Mass transfer rate of 6.1e-6 M_sun/yr

Orbital period increasing at 4.2e-7 days/yr

System distance estimated at 1466 pc

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.