论文标题
部分可观测时空混沌系统的无模型预测
Radio footprints of a minor merger in the Shapley Supercluster: From supercluster down to galactic scales
论文作者
论文摘要
Shapley超级集群（$ \ langle z \ rangle \ oft0.048 $）包含几十个重力绑定的簇和组，这是群集合并无线电研究的理想主题。我们使用了新的高灵敏度无线电观察结果来研究从超集群到银河系尺度的Shapley超级收集器中质量组装不太能量的事件。我们在3558和3562之间创建了整个区域的总强度图像，从$ \ sim 230 $到$ \ sim 1650 $ MHz，使用askap，meerkat和gmrt，敏感性从$ \ sim 6 $到$ \ $ \ sim \ sim \ sim 100 $ $ $ $ $ $ $ $ $ jy $ jy jy jy jy jy $^$^$^{-1} $。我们对扩展发射特征进行了详细的形态和光谱研究，并配以XMM-Newton的ESO-VST光学成像和X射线数据。我们报告了在$ \ sim 1 $ MPC刻度上连接群集和一个组的第一个GHz频率检测，即在$ \ sim 1 $ mpc刻度上，即：A 3562和组SC 1329---313。它在形态上与该区域的X射线发射相似。我们还发现（1）SC 1329-313中的Galaxy SOS 61086中的RAM压力剥离产生的无线电尾巴； （2）头尾射线银河系，其尾巴被折断，并在未对准的酒吧中达到顶峰； （3）在3558的中心的Ultrasteep弥散发射。最后（4），我们在3562中确认了无线电光环的超固定频谱性质。我们的研究强烈支持SC 1329-313在3562北部的SC 1329-313 Flyby的情况。 [简略...]
The Shapley Supercluster ($\langle z \rangle\approx0.048$) contains several tens of gravitationally bound clusters and groups, making it it is an ideal subject for radio studies of cluster mergers. We used new high sensitivity radio observations to investigate the less energetic events of mass assembly in the Shapley Supercluster from supercluster down to galactic scales. We created total intensity images of the full region between A 3558 and A 3562, from $\sim 230$ to $\sim 1650$ MHz, using ASKAP, MeerKAT and the GMRT, with sensitivities ranging from $\sim 6$ to $\sim 100$ $μ$Jy beam$^{-1}$. We performed a detailed morphological and spectral study of the extended emission features, complemented with ESO-VST optical imaging and X-ray data from XMM-Newton. We report the first GHz frequency detection of extremely low brightness intercluster diffuse emission on a $\sim 1$ Mpc scale connecting a cluster and a group, namely: A 3562 and the group SC 1329--313. It is morphologically similar to the X-ray emission in the region. We also found (1) a radio tail generated by ram pressure stripping in the galaxy SOS 61086 in SC 1329-313; (2) a head-tail radio galaxy, whose tail is broken and culminates in a misaligned bar; (3) ultrasteep diffuse emission at the centre of A 3558. Finally (4), we confirm the ultra-steep spectrum nature of the radio halo in A 3562. Our study strongly supports the scenario of a flyby of SC 1329-313 north of A 3562 into the supercluster core. [abridged...]
