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首页> 外文期刊>The Astrophysical journal >RADIO EMISSION FROM GRO Jl655--40 DURING THE 1994 JET EJECTION EPISODES
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RADIO EMISSION FROM GRO Jl655--40 DURING THE 1994 JET EJECTION EPISODES

机译：1994年JET爆发期间GRO Jl655--40的无线电发射

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摘要

We report multifrequency radio observations of GRO J1655--40 obtained with the Australia Tele- scope Compact Array, the Molonglo Observatory Synthesis Telescope and the Hartebeesthoek Radio Astronomy Observatory at the time of the major hard X-ray and radio outbursts in l994 August- September. The radio emission reached levels of the order of a few Jy and was found to be linearly polarized by up to 10/100, indicating a synchrotron origin. The light curves are in good agreement with those measured with the VLA, but our closer time sampling has revealed two new short-lived events and significant deviations from a simple exponential decay. The polarization data show that the magnetic field is well ordered and aligned at right angles to the radio jets for most of the monitoring period. The time evolution of the polarization cannot be explained solely in terms of a simple synchrotron bubble model, and we invoke a hybrid "core-lobe" model with a core which contributes both synchrotron and free-free emission and" lobes," which are classical synchrotron emitters.
机译：我们报告了在1994年8月至9月发生主要的硬X射线和射电爆发时，澳大利亚望远镜紧凑型阵列，莫隆洛天文台综合望远镜和哈特比斯泰克射电天文台获得的GRO J1655--40的多频射电观测结果。 。无线电发射达到几Jy的数量级，并且被线性极化高达10/100，表明是同步加速器起源。光曲线与用VLA测得的光曲线非常吻合，但我们更紧密的时间采样显示了两个新的短暂事件以及与简单指数衰减的显着偏差。极化数据表明，在大部分监视期间，磁场井井有条，并与无线电射流成直角对齐。极化的时间演化不能仅用简单的同步加速器气泡模型来解释，我们调用具有核心的混合“核-叶”模型，该模型同时具有同步加速器和自由发射以及“波瓣”，这是经典的同步加速器发射器。

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