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.
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机译：微类星体是恒星X射线双星，其行为与银河系类星体的按比例缩小版本相同。 LS 5039恒星是一种新的微类星体系统，它在距太阳3千帕的距离上具有相对论性等离子体的明显持续射出。它也可能与COMPTON-Gamma射线天文台卫星上的高能伽马射线实验望远镜（EGRET）发现的γ射线源有关。在发现LS 5039之前，在银河系中只发现了极少数的微类星体，并且在高能γ射线中没有发现它们。
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