Sub-kpc radio jets in the brightest central galaxy of the cool-core galaxy cluster RXJ1720.1+2638
Sub-kpc radio jets in the brightest central galaxy of the cool-core galaxy cluster RXJ1720.1+2638
复制标题
冷核星系团 RXJ1720.1 2638 最亮中央星系中的 sub-kpc 射电喷流
DOI：
10.1093/mnrasl/slac160
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Perrott Y
中科院分区：
文献类型：
--
作者：
Perrott Y
冷核星系团RXJ1720.1+2638在星系团核心附近有扩展的射电发射，被称为微晕。这种辐射的起源仍有争议，其中一个谜题是，最亮的中央星系中的超大质量黑洞是否在积极地为喷流提供动力。在这里，我们提供了高分辨率的e-MERLIN观测结果，清楚地表明亚kpc射流的存在；这可能对提出的微晕发射的起源有影响，它提供了一个持续的相对论性电子源，而不是过去某个时候的单一爆发，就像以前在试图重现微晕承载系统的观测特征的模拟中假设的那样。
The cool-core galaxy cluster RXJ1720.1+2638 hosts extended radio emission near the cluster core, known as a minihalo. The origin of this emission is still debated and one piece of the puzzle has been the question of whether the supermassive black hole in the brightest central galaxy is actively powering jets. Here, we present high-resolution e-MERLIN observations clearly indicating the presence of sub-kpc jets; this may have implications for the proposed origin of the minihalo emission, providing an ongoing source of relativistic electrons rather than a single burst sometime in the past, as previously assumed in simulations attempting to reproduce observational characteristics of minihalo-hosting systems.