We use experimental data of the FIRST survey to construct the radiation pattern of external components of extended radio sources. The radiation pattern differs from spherical. The greatest deviation from sphere is observed in the region facing the central component, where there is a deep minimum. The minimum of radiation in the beam pattern is associated with the region where the regular magnetic field of the jet transforms into entangled magnetic field of the external component. Perhaps the minimum is determined not only by the component’s radiation, but also the screening by structural elements of the extended radio source.

中文翻译：

---

扩展无线电源对外部组件的辐射

我们使用FIRST调查的实验数据来构建扩展无线电源外部组件的辐射方向图。辐射方向图不同于球形。在面对中心分量的区域中观察到与球体的最大偏差，该偏差很小。光束方向图上的辐射最小值与射流的规则磁场转换为外部组件的纠缠磁场的区域有关。最小值可能不仅取决于组件的辐射，还取决于扩展无线电源的结构元素的屏蔽。