Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.222..261w&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 222, Sept. 15, 1986, p. 261-271.
Astronomy and Astrophysics
Astronomy
91
Doppler Effect, Emission Spectra, Line Spectra, Stellar Spectrophotometry, X Ray Spectra, Accretion Disks, Exosat Satellite, Iron, Plasma Jets, Spectral Energy Distribution, Stellar Models
Scientific paper
The authors present the results from a series of X-ray observations of SS433 made with the EXOSAT Observatory in 1983 - 1985 which show that strong iron line emission is present in its X-ray spectrum and displays large energy shifts which vary as a function of the 164-day precession phase. These energy shifts are entirely consistent with the Doppler shifts predicted in the kinematic model for the relativistic jets in SS433. The line energy in the rest-frame is 6.7 keV, suggesting a thermal origin for the line emission. Changes in the visibility of the lines which occur as function of 164-day phase are interpreted as being due to obscuration by a precessing accretion disc. The authors use this new result to provide additional constraints on the system geometry, and the physical conditions in the jets, and to derive a lower limit to the mass outflow rate. They also discuss the implications for the jet acceleration mechanism.
Brinkmann Wolfgang
King Andrew R.
Stewart Gordon C.
Watson Michael G.
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