Tree-structured grid model of line and polarization variability from massive binaries
Department of Physics and Astronomy, University of Pittsburgh, 3941 O'Hara Street, Pittsburgh, PA 15260, USA
Corresponding author: R. Kurosawa, firstname.lastname@example.org
Accepted: 28 August 2001
We have developed a 3-D Monte Carlo radiative transfer model which computes line and continuum polarization variability for a binary system with an optically thick non-axisymmetric envelope. This allows us to investigate the complex (phase-locked) line and continuum polarization variability features displayed by many massive binaries: W-R+O, O+O, etc. An 8-way tree data structure constructed via a "cell-splitting" method allows for high precision with efficient use of computer resources. The model is not restricted to binary systems; it can easily be adapted to a system with an arbitrary density distribution and large density gradients. As an application to a real system, the phase dependent Stokes parameters and the phase dependent Hei (5876) profiles of the massive binary system V444 Cyg (WN5+O6 III-V) are computed.
Key words: polarization / methods: numerical / binaries: eclipsing / line: formation / stars: individual: V444 Cyg
© ESO, 2001