Dark matter in the Reticulum II dSph: a radio search

Understand

We present a deep radio search in the Reticulum II dwarf spheroidal (dSph) galaxy performed with the Australia Telescope Compact Array.

• Observations were conducted at 16 cm wavelength, with an rms sensitivity of 0.01 mJy/beam, and with the goal of searching for synchrotron emission induced by annihilation or decay of weakly interacting massive particles (WIMPs).
• Data were complemented with observations on large angular scales taken with the KAT-7 telescope.
• We find no evidence for a diffuse emission from the dSph and we derive competitive bounds on the WIMP properties.