Radio footprints of a minor merger in the Shapley Supercluster: From supercluster down to galactic scales

The Shapley Supercluster ($\langle z \rangle\approx0.048$) contains several tens of gravitationally bound clusters and groups, making it is an ideal subject for radio studies cluster mergers. We used new high sensitivity observations to investigate the less energetic events mass assembly in from supercluster down galactic scales. created total intensity images full region between A 3558 3562, $\sim 230$ 1650$ MHz, using ASKAP, MeerKAT GMRT, with sensitivities ranging 6$ 100$ $\mu$Jy beam$^{-1}$. performed a detailed morphological spectral study extended emission features, complemented ESO-VST optical imaging X-ray data XMM-Newton. report first GHz frequency detection extremely low brightness intercluster diffuse on 1$ Mpc scale connecting group, namely: 3562 group SC 1329--313. It morphologically similar region. also found (1) tail generated by ram pressure stripping galaxy SOS 61086 1329-313; (2) head-tail galaxy, whose broken culminates misaligned bar; (3) ultrasteep at centre 3558. Finally (4), we confirm ultra-steep spectrum nature halo 3562. Our strongly supports scenario flyby 1329-313 north into core. [abridged...]