The EMU view of the Large Magellanic Cloud : troubles for sub-TeV WIMPs

Marco Regis, Javier Reynoso-Cordova, Miroslav D. Filipović, Marcus Brüggen, Ettore Carretti, Jordan Collier, Andrew M. Hopkins, Emil Lenc, Umberto Maio, Joshua R. Marvil, Ray P. Norris, Tessa Vernstrom

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

We present a radio search for WIMP dark matter in the Large Magellanic Cloud (LMC). We make use of a recent deep image of the LMC obtained from observations of the Australian Square Kilometre Array Pathfinder (ASKAP), and processed as part of the Evolutionary Map of the Universe (EMU) survey. LMC is an extremely promising target for WIMP searches at radio frequencies because of the large J-factor and the presence of a substantial magnetic field. We detect no evidence for emission arising from WIMP annihilations and derive stringent bounds on the annihilation rate as a function of the WIMP mass, for different annihilation channels. This work excludes the thermal cross section for masses below 480 GeV and annihilation into quarks.
Original languageEnglish
Article number46
Number of pages21
JournalJournal of Cosmology and Astroparticle Physics
Volume2021
Issue number11
DOIs
Publication statusPublished - 2021

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