X-ray observations of the jets in SS433

  • G. C. Stewart
  • M. G. Watson
Jets and Winds
Part of the Lecture Notes in Physics book series (LNP, volume 266)


EXOSAT observations of SS433 have revealed the presence of an emission line whose energy varies with time. The variation is consistent with that predicted for a line with a rest energy of 6.7 keV with shifts in energy analogous to those of the moving optical emission lines, i.e. the material emitting the X-rays is in jets moving at 0.26c and precessing about a fixed axis. Only one X-ray line is seen at any one time, however. Using this fact, and observations of an X-ray eclipse, constraints are derived on the dimensions of the components of the SS433 system. In conjunction with previously derived optical results this leads to a mass estimate for the compact object in the system of > 10M<. The energetics of the material responsible for the X-ray emission from the jet also require a mass of > 10M if the system is to be sub-Eddington.


Accretion Disk Equivalent Width Compact Object Rest Energy Orbital Separation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 1986

Authors and Affiliations

  • G. C. Stewart
    • 1
  • M. G. Watson
    • 1
  1. 1.X-ray Astronomy Group, Physics DepartmentUniversity of LeicesterLeicesterUK

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