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Article overview
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SS433: the second Wolf-Rayet X-ray binary ? | | Yael Fuchs
; Lydie Koch-Miramond
; Peter Abraham
; | | Date: |
23 Aug 2002 | | Subject: | astro-ph | | Affiliation: | Service d’Astrophysique CEA/Saclay France, Universite Paris 7 France, Konkoly Observatory Budapest Hungary | | 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. | | Source: | arXiv, astro-ph/0208432 | | Services: | Forum | Review | PDF | Favorites | |
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