We have found a class of circular radio objects in the Evolutionary Map of the Universe Pilot Survey, using the Australian Square Kilometre Array Pathfinder telescope. The objects appear in radio images as circular edge-brightened discs, about one arcmin diameter, that are unlike other objects previously reported in the literature. We explore several possible mechanisms that might cause these objects, but none seems to be a compelling explanation.

中文翻译：

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银河高纬度意外的圆形无线电物体

我们使用澳大利亚平方公里阵列探路者望远镜在宇宙试点调查的进化地图中发现了一类圆形射电物体。这些物体在无线电图像中显示为圆形边缘变亮的圆盘，直径约为 1 弧分，与文献中先前报道的其他物体不同。我们探索了几种可能导致这些物体的机制，但似乎没有一个是令人信服的解释。