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On the Binary Nature of SS 433

  • Linda Schmidtobreick
  • Katherine Blundell
Chapter

Abstract

We present time-resolved optical spectroscopy of the famous X-ray binary SS 433. We obtained 61 medium resolution spectra spread over three months and thus cover roughly five orbits and about half a precession phase. We used various emission lines, that we attribute to the accretion disc, to determine the radial velocities of the compact component. They are of course modulated with the orbital period but in addition show a variation of the system velocity on a longer time scale. With the present data it is not possible to determine whether this is a transient effect or a periodic variation, although we present various possible interpretations of this effect.

Keywords

Microquasars SS 433 

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Copyright information

© Springer Science+Business Media B.V. 2006

Authors and Affiliations

  • Linda Schmidtobreick
    • 1
  • Katherine Blundell
    • 2
  1. 1.European Southern ObservatorySantiago 19Chile
  2. 2.Department of PhysicsUniversity of OxfordOxfordUK

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