Physical insights from the spectrum of the radio halo in MACS J0717.5+3745
Physical insights from the spectrum of the radio halo in MACS J0717.5+3745
We present new LOw-Frequency ARray observations of the massive merging galaxy cluster MACS J0717.5+3745, located at a redshift of 0.5458. The cluster hosts the most powerful radio halo known to date. These new observations, in combination with published uGMRT (300−850 MHz) and VLA (1−6.5 GHz) data, reveal that the halo …