A massive cluster at z = 0.288 caught in the process of formation: The case of Abell 959
A massive cluster at z = 0.288 caught in the process of formation: The case of Abell 959
The largest galaxy clusters are observed still to be forming through major cluster-cluster mergers, often showing observational signatures such as radio relics and giant radio haloes. Using LOFAR Two-meter Sky Survey data, we present new detections of both a radio halo (with a spectral index of $\alpha_{143}^{1400}=1.48^{+0.06}_{-0.23}$) and a likely …