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Origin of the peculiar filamentary radio emission in PLCKG287

Determine the physical origin of the peculiar filamentary radio emission features observed in the galaxy cluster PSZ2 G286.98+32.90 (PLCKG287) by GMRT and JVLA, specifying the mechanisms that generate these filaments in the cluster environment.

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Background

PLCKG287 is a massive, hot cluster at z=0.383 that hosts both a giant radio halo and two prominent radio relics, consistent with a disturbed dynamical state and multiple merger activity. In addition to these canonical diffuse radio components, observations have revealed unusual filamentary radio structures.

The paper notes that the physical origin of these filamentary radio features has not been established. Clarifying their origin would inform models of particle acceleration, magnetic field topology, and merger-driven processes in the intracluster medium.

References

Other peculiar features of filamentary radio emission have also been detected, whose origin is unknown \citep{Bonafede_2014}.

— Deep Chandra observations of PLCKG287.0+32.9: a clear detection of a shock front in a heated former cool core (2503.13735 - Gitti et al., 17 Mar 2025) in Section 1 Introduction