SS433: the second Wolf-Rayet X-ray binary ?
Abstract
We present mid-infrared spectrophotometric observations of SS433 with ISOPHOT. The HeI+HeII lines in both spectra of SS433 and of the Wolf-Rayet star WR147, a wind-colliding WN8+BO5 binary system, closely match. The 2.5-12 micron continuum radiation is due to an expanding wind free-free emission in an intermediate case between optically thick and optically thin regimes. The inferred mass loss rate evaluation gives ~10^{-4} Msun/yr. Our results are consistent with a Wolf-Rayet-like companion to the compact object in SS433. A similar study for Cygnus X-3 confirms the Wolf-Rayet-like nature of its companion, although with a later WN type than previously suggested.
Keywords
Cite
@article{arxiv.astro-ph/0208432,
title = {SS433: the second Wolf-Rayet X-ray binary ?},
author = {Yael Fuchs and Lydie Koch-Miramond and Peter Abraham},
journal= {arXiv preprint arXiv:astro-ph/0208432},
year = {2007}
}
Comments
4 pages, 3 figures, Proceedings of the 4th Microquasar Workshop, eds. Ph Durouchoux, Y. Fuchs and J. Rodriguez, published by the Center for Space Physics: Kolkata minor typos corrected