Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...240l...5f&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 240, no. 2, Dec. 1990, p. L5-L7.
Astronomy and Astrophysics
Astrophysics
36
Accretion Disks, Eclipsing Binary Stars, Stellar Mass, Stellar Mass Accretion, Stellar Systems, Light Curve, Radial Velocity, Stellar Atmospheres, Stellar Motions, Stellar Orbits
Scientific paper
This paper presents results from the He-II-line radial velocity analysis using data from spectral observations of SS 433 made with a 6-m telescope in 1981, 1982, 1986, and 1988, when SS 433 was in a quiescent state. Spectral observations reveal that the He II 4686 A line has two states, one dominated by the disc, and the other dominated by a stream-shock at the adjacent precesson phases. It is estimated that the division of the He II radial-velocity curves into these two types takes place at the precession phases 0.9 and 0.1. The curves reflecting the orbital motion of the compact star are presented.
Bychkova L. V.
Fabrika Sergei N.
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