We report the results of the Australia Telescope Compact Array (ATCA) 15 mm observation of the Phoenix galaxy cluster possessing an extreme star-burst brightest cluster galaxy (BCG) at the cluster center. We spatially resolved radio emission around the BCG, and found diffuse bipolar and bar-shape structures extending from the active galactic nucleus (AGN) of the BCG. They are likely radio jets/lobes, whose sizes are ~10-20 kpc and locations are aligned with X-ray cavities. If we assume that the radio jets/lobes expand with the sound velocity, their ages are estimated to be ~10 Myr. We also found compact radio emissions near the center and suggest that they are another young bipolar jets with ~1 Myr of age. Moreover, we found extended radio emission surrounding the AGN and discussed the possibility that the component is a product of the cooling flow, by considering synchrotron radiation partially absorbed by molecular clumps, free-free emission from the warm ionized gas, and the spinning dust emission from dusty circum-galactic medium.

中文翻译：

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在凤凰星系团中心发现射电喷流

我们报告了澳大利亚望远镜紧凑阵列 (ATCA) 15 毫米观测凤凰星系团的结果，该星系团在星团中心拥有一个极端星爆最亮星团星系 (BCG)。我们对 BCG 周围的无线电发射进行了空间解析，并发现了从 BCG 的活动星系核 (AGN) 延伸的弥散双极和条形结构。它们很可能是射电射流/波瓣，其大小约为 10-20 kpc，位置与 X 射线腔对齐。如果我们假设无线电射流/波瓣随着声速扩大，它们的年龄估计约为 10 Myr。我们还在中心附近发现了紧凑的无线电发射，并表明它们是另一种年龄约为 1 Myr 的年轻双极喷流。而且，