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

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

Marco Regis
(
- Turin U. and
- INFN, Turin
)
,
Javier Reynoso-Cordova
(
- Turin U. and
- INFN, Turin
)
,
Miroslav D. Filipović
(
- Western Sydney U., Penrith
)
,
Marcus Brüggen
(
- Hamburg U.
)
,
Ettore Carretti
(
- Bologna, Ist. Radioastronomia
)

Jun 15, 2021

23 pages

Published in:

JCAP 11 (2021) 11, 046

Published: Nov 23, 2021

e-Print:

2106.08025 [astro-ph.HE]

DOI:

10.1088/1475-7516/2021/11/046

View in:

ADS Abstract Service

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Abstract: (IOP)

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.

Note:

23 pages, 14 figures. v2: presentation improved, discussion expanded, accepted for publication in JCAP

dark matter theory
absorption and radiation processes
extragalactic magnetic fields
WIMP: annihilation
WIMP: dark matter
cross section: thermal
cloud
radio wave
magnetic field
GeV

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)

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