Sensitivity of SKA to dark matter induced radio emission

Understand

Conventionally, one can constrain the dark matter (DM) interaction with DM mass heavier than GeV by searching for DM induced synchrotron emission in the radio frequency band.

• However, an MeV DM can also generate detectable radio emission if electrons and positrons produced by DM annihilation or decay undergoes inverse Compton scattering (ICS) with the cosmic microwave background.
• The upcoming radio telescope Square Kilometre Array (SKA) is designed to operate with extremely high sensitivity.
• We investigate the capability of the SKA to detect DM particles in a board mass range from MeV to TeV, for both annihilation and decay scenarios.