The LOFAR and JVLA view of the distant steep spectrum radio halo in MACS J1149.5+2223

L. Bruno, K. Rajpurohit, G. Brunetti +11

Radio halos and relics are Mpc-scale diffuse radio sources in galaxy clusters, with a steep spectral index $\alpha >1$ ($S\propto {\nu }^{-\alpha }$). It has been proposed that they arise from part…