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On the physics of Circinus X-1. I. Periodic flares in the X-ray, optical and radio regimes

  • R. F. Haynes
  • I. Lerche
  • P. G. Murdin
Theoretical aspects of relativistic astrophysics
Part of the Lecture Notes in Physics book series (LNP, volume 124)

Abstract

Data from the X-ray, radio and optical observations of Circinus X-1 are used to derive a binary star model for this object. Mass transfer between the primary star (Mp ∼ 20 Mp), and the compact companion star (Mc = Me), most likely a neutron star, triggers one or more expanding Eddington luminosity-driven shocks in the vicinity of the compact star which in turn produce radio emission. Variable optical emission results from the changing Roche lobe surface in the highly eccentric system (e ∼ 0.8). The X-ray radiation results from the matter in the accretion disk dribbling down on to the surface of the compact star. Disk replenishment per orbit (5 × 10−8 to 5 × 10−10 Mp) occurs near periastron passage. The variation of the X-ray emission is caused by absorption of the X-rays in the stellar wind of the primary star.

Keywords

Neutron Star Shock Front Radio Emission Accretion Disk Stellar Wind 
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 1980

Authors and Affiliations

  • R. F. Haynes
    • 1
  • I. Lerche
    • 2
  • P. G. Murdin
    • 3
  1. 1.Division of RadiophysicsCSIROSydneyAustralia
  2. 2.Department of PhysicsUniversity of ChicagoChicagoUSA
  3. 3.Anglo-Australian ObservatorySydneyAustralia

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