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Discovery of a High-Energy Gamma-Ray-Emitting Persistent Microquasar

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Science  30 Jun 2000:
Vol. 288, Issue 5475, pp. 2340-2342
DOI: 10.1126/science.288.5475.2340

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Abstract

Microquasars are stellar x-ray binaries that behave as a scaled-down version of extragalactic quasars. The star LS 5039 is a new microquasar system with apparent persistent ejection of relativistic plasma at a 3-kiloparsec distance from the sun. It may also be associated with a γ-ray source discovered by the Energetic Gamma Ray Experiment Telescope (EGRET) on board the COMPTON–Gamma Ray Observatory satellite. Before the discovery of LS 5039, merely a handful of microquasars had been identified in the Galaxy, and none of them was detected in high-energy γ-rays.

  • * To whom correspondence should be addressed. E-mail: josepmp{at}am.ub.es

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