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SS 433: a WR X-ray binary or a WR-type phenomenon ? | | Yael Fuchs
; L. Koch Miramond
; P. Abraham
; | | Date: |
20 Oct 2004 | | Subject: | astro-ph | | Affiliation: | Service d’Astrophysique, CEA/Saclay, France ; Konkoly Observatory, Budapest, Hungary | | Abstract: | We present mid-infrared spectra of the microquasar SS 433 obtained with the Infrared Space Observatory (spectroscopic mode of ISOPHOT) and compare them to the spectra of four Wolf-Rayet stars. The mid-infrared spectrum of SS 433 shows mainly HI and HeI emission lines and is very similar to the spectrum of WR 147, a WN8(h)+B0.5V binary with a colliding wind. The 2-12 micron continuum emission corresponds to optically thin and partially optically thick free-free emission from which we calculate a mass loss rate of 1.4-2.2x10^{-4} M_sun/yr if the wind is homogeneous and a third of these values if it is clumped, which is consistent with a strong WN stellar wind. We propose that this strong wind outflows from a geometrically thick envelope of material surrounding the compact object like a stellar atmosphere, imitating the Wolf-Rayet phenomenon. | | Source: | arXiv, astro-ph/0410480 | | Services: | Forum | Review | PDF | Favorites | |
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