Ubiquity of cluster-wide diffuse radio emission beyond mini-halos in cool-core clusters

Determine whether cluster-wide diffuse radio emission extending beyond the spatial scales of radio mini-halos is ubiquitous in cool-core galaxy clusters, using sufficiently deep low-frequency radio observations capable of probing below the expected radio power–mass relation.

Background

The paper discusses recent detections of diffuse radio emission outside the cores of some (semi-)relaxed clusters and notes that, prior to this work, Perseus had no evidence for cluster-scale diffuse emission. The authors emphasize that current surveys may not be deep enough to reveal faint emission below the radio power–mass relation, leaving the broader prevalence of such cluster-wide emission in cool-core systems unresolved.