The slaved disc model for SS 433

Astronomy and Astrophysics – Astronomy

Scientific paper

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Eclipsing Binary Stars, Stellar Mass Accretion, Stellar Models, X Ray Sources, Black Holes (Astronomy), Mass Transfer, Stellar Gravitation

Scientific paper

A slaved disk model for SS 433 is studied in which the beams originate normal to the surface of an accretion disk around a compact object in a binary system. The 13-day period in the 'stationary' system of lines is assumed to be associated with binary orbital motion and the 164-day periodicity in the moving line system is identified with disk precession. It is assumed that material is processed through the disk rapidly (relative to 164 days) so that the disk precesses at the same rate as the spin axis of the secondary which is driven by the gravitational torque applied by the compact object. If the slaved disk model is applicable to SS 433 and if the mass of the secondary is not less than 1 solar mass it follows that the compact object is a massive black hole.

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