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RELATIVISTIC MOTION IN A NEARBY BRIGHT X-RAY SOURCE

机译:明亮的X射线源附近的相对论运动

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THE recent discovery(1) of radio components apparently moving away from a Galactic source of transient X-ray emission faster than the speed of light (superluminal motion) has identified a low-energy Galactic counterpart to quasars. Here we report high-resolution radio observations of a second Galactic superluminal radio source GRO J1655-40, which was detected as an X-ray transient(2) on 27 July 1994. Our radio images reveal two components moving away from each other at an angular speed of 65 +/- 5 mas d(-1), corresponding to superluminal motion at the estimated distance of 3-5 kpc. The 12-day delay between the X-ray and radio outbursts suggests that the ejection of material at relativistic speeds occurs during a stable phase of accretion onto a black hole, which follows an unstable phase with a high accretion rate, [References: 13]
机译:最近的发现(1)显然使无线电组件从瞬态X射线发射的银河源移开的速度快于光速(超光速运动),已经确定了类星体的低能银河对应物。在这里,我们报告了第二个银河系超发光无线电源GRO J1655-40的高分辨率无线电观测结果,该辐射源于1994年7月27日被检测为X射线瞬变(2)。 65 +/- 5 mas d(-1)的角速度,对应于估计的3-5 kpc处的超光速运动。 X射线和射电爆发之间存在12天的延迟,这表明材料以相对论速度射出是在稳定的吸积阶段到黑洞中发生的,此阶段随后是不稳定的阶段,吸积率很高,[参考文献:13]

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