A Radio-Frequency Search for WIMPs in RXC J0225.1-2928

Keywords: dark matter indirect detection, WIMPs, radio synchrotron emission


Recent studies focusing on the use of radio data in indirect dark matter detection have led to a set of highly
competitive limits on the WIMP annihilation cross-section, especially in light of high-resolution data from
instruments like ASKAP and MeerKAT. In this work, we present an analysis of radio observations of the
RXC J0225.1-2928 galaxy cluster, taken from the recent MeerKAT Galaxy Cluster Legacy Survey public
data release. We adopt a robust morphological analysis of this source that allows us to derive a set of
upper limits on the annihilation cross-section, and in our most constraining scenario, these results are
comparable to the most stringent limits yet found in the literature.

Special Issue on Neutrinos and Dark Matter-2022