| Issue |
A&A
Volume 379, Number 1, November III 2001
|
|
|---|---|---|
| Page(s) | 336 - 346 | |
| Section | Section $secnum inconnue | |
| DOI | https://doi.org/10.1051/0004-6361:20011233 | |
| Published online | 15 November 2001 | |
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, kurosawa@phyast.pitt.edu
Received:
20
June
2001
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
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