Unifying disc-jet behaviour in X-ray binaries: An optical/IR approach

David M. Russell, Dipankar Maitra, Rob P. Fender, Fraser Lewis

Research output: Contribution to journalConference articlepeer-review


Synchrotron emission from jets produced by X-ray binaries can be detected at optical and infrared (IR) frequencies. I show that optical/IR colour-magnitude diagrams of the outbursts of nine X-ray binaries successfully separate thermal disc emission from non-thermal jet emission, in both black hole and neutron star sources. A heated single-temperature blackbody is able to reproduce the observed relations between colour and magnitude, except when excursions are made to a redder colour than expected, which is due to jet emission. The general picture that is developed is then incorporated into the unified picture of disc-jet behaviour in black hole X-ray binaries. At a given position of a source in the X-ray hardness-intensity diagram, the radio, IR and optical properties can be inferred. Similarly, it is possible to predict the X-ray and radio luminosities and spectral states from optical/IR monitoring.

Original languageEnglish (US)
JournalInternational Conference Recent Advances in Natural Language Processing, RANLP
StatePublished - 2008
Event7th Microquasar Workshop: Microquasars and Beyond, MQW 2008 - Foca, Izmir, Turkey
Duration: Sep 1 2008Sep 5 2008

ASJC Scopus subject areas

  • Software
  • Computer Science Applications
  • Artificial Intelligence
  • Electrical and Electronic Engineering


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