Synchrotron Emission from Dark Matter Annihilation: Predictions for Constraints from Non-detections of Galaxy Clusters with New Radio Surveys

Understand

The annihilation of dark matter particles is expected to yield a broad radiation spectrum via the production of Standard Model particles in astrophysical environments.

• In particular, electrons and positrons from dark matter annihilation produce synchrotron radiation in the presence of magnetic fields.
• Galaxy clusters are the most massive collapsed structures in the universe, and are known to host $\sim\mu$G-scale magnetic fields.
• They are therefore ideal targets to search for, or to constrain the synchrotron signal from dark matter annihilation.