Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997azh....74..392p&link_type=abstract
Astronomicheskij Zhurnal, vol. 74, p. 392
Astronomy and Astrophysics
Astronomy
2
Binary Stars, Gas Jets, H Lines, Emission Spectra, Accretion Disks, Astronomical Models, Shock Wave Propagation, Astronomical Photometry, Plasma Jets
Scientific paper
Spectral data on hydrogen emission lines from the jets of SS 433 obtained on the SAO 6-m telescope are presented, together with the results of multicolor photometry of this object. The dependences of the fluxes in the U, B, and R filters on the V flux are obtained. The dependence of the intensity of the moving lines in a co-moving coordinate system on the precession phase is found using these data and data from the literature. The maximum jet emission occurs at a phase of about 0.8. The observed precession intensity curves can be understood if the directional pattern for the jet emission has two maxima placed approximately symmetrically with respect to the center, with the lead maximum having a small angle to the jet velocity vector, towards the direction of the precessional motion. In an empirical model of the directional pattern, the leading part of the gas cloud surface in the jets is a factor of 1.5-2.0 brighter than the trailing part. Two models in which this anisotropic jet emission forms in (1) individually optically thick clouds and (2) the opaque jet as a whole (or in clusters of clouds) are discussed.
Fabrika Sergei N.
Panferov Alexander
Rakhimov Yu. V.
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