Near Infrared Excess Energy in Binary System V367 Cygni

Abstract

Spectral energy distribution of the Serpentid type binary V367 Cyg was obtained using several previous photometric measurements made on this system in different spectral bands. We found Near IR excess starting from 3 μm and this excess flux is attributed to the free–free emission from the mass accretion disk of the binary system. We adopted the temperature of primary component as 8,000 K. We added the free–free emission flux of the circumstellar disk to the black body energy of the primary component to find a best fit for the observed near infrared excess flux. In this fitting we left the electron density of the circumstellar disk n_e of the free–free emission as a free parameter. We found that volume emission measure of the circumstellar disk is ∼ 9 ×10⁵⁹ cm^− 3.