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

Journal
Date Issued
2021
Author(s)
Regis, Marco
•
Reynoso-Cordova, Javier
•
Filipović, Miroslav D.
•
Brüggen, Marcus
•
•
Collier, Jordan
•
Hopkins, Andrew M.
•
Lenc, Emil
•
•
Marvil, Joshua R.
•
Norris, Ray P.
•
Vernstrom, Tessa
DOI
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.
Volume
2021
Issue
11
Start page
046
Uri
Url
Issn Identifier
1475-7516
Ads BibCode
2021JCAP...11..046R
Rights
open.access
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