Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....78l..17m&link_type=abstract
Astronomy and Astrophysics, vol. 78, no. 3, Oct. 1979, p. L17-L20. Research supported by the Max-Planck-Gesellschaft zur Foerde
Astronomy and Astrophysics
Astrophysics
5
Emission Spectra, Stellar Spectra, Thomson Scattering, Variable Stars, Gas Flow, Line Spectra, Relativistic Effects, Stellar Mass Ejection
Scientific paper
The paper examines Thomson scattered lines in the SS433 spectrum region which emits unshifted stationary emission lines and two regions of relativistically moving gas which emit the tunable emission lines. Line radiation in any of these regions can Thomson scatter into the line of sight, and these lines provide a tool for studying the structure of SS433. It is possible to conclude that the relativistic gas is flowing away from the region which emits the stationary lines, and that the angular extent of each region seen from the other is small, excluding models where the moving lines come from a region surrounded by the unshifted line emitting region. The scattered lines are expected to be highly polarized, and measurements of the polarization plane and its time variations will provide more information on the geometry of the system.
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