The optical jets of SS 433 - Physical parameters

Details The optical jets of SS 433 - Physical parameters The optical jets of SS 433 - Physical parameters

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997azh....74..574p&link_type=abstract

Astronomicheskij Zhurnal, vol. 74, p. 574

Astronomy and Astrophysics

Astrophysics

1

Radio Jets (Astronomy), Balmer Series, Emission Spectra, H Lines, Molecular Clouds, Optical Thickness, H Gamma Line, Astrophysics, H Beta Line, Gas Density, Gas Dynamics

Scientific paper

The Balmer decrements of the emission lines of the SS 433 jets are derived using data from the Special Astrophysical Observatory 6-m telescope. The Balmer decrements for the two jets are very similar. Like the intensities of the moving lines, they vary with precessional phase and are significantly different at the phases of minimum and maximum moving line intensity. Their mean values, H-alpha/H-beta = 1.3 and H-gamma/H-beta = 0.8, suggest the gas density is roughly 10 exp 13/cu cm. The physical parameters of the gas and the gaseous clouds in the jets are derived. The kinetic luminosity of the jets is of the order of 10 exp 39 erg/s, and the clouds are optically thick in the H-alpha line and have sizes of about 10 exp 8 cm. The clouds may group in clusters with a size of 10 exp 12 cm. The behavior of the Balmer decrements and moving line intensities provides evidence that the optical depth of the emitting gas layer toward the observer decreases near precessional phase 0.8. This may be caused by a nonspherical shape of the gas clouds or brightening of the gas by shock waves. A determining factor in the cloud dynamics and the formation of the jet emission is the interaction of the jets with the gas from a slow accretion disk wind.

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