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

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arxiv 2106.08025 v2 pith:P4GE4RWK submitted 2021-06-15 astro-ph.HE astro-ph.COhep-ph

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

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Forward citations

Cited by 5 Pith papers

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    SPHEREx should improve current limits on the axion-photon coupling for 0.5-3 eV ALP dark matter by observing the Milky Way halo in its deep field, the LMC, and dwarf spheroidals.

  4. Strong Constraints on Dark Photon and Scalar Dark Matter Decay from INTEGRAL and AMS-02 data

    hep-ph 2024-11 conditional novelty 6.0 of 10

    Using INTEGRAL x-ray and AMS-02 positron data, the authors set lower limits on dark photon and scalar dark matter decay lifetimes from 10^25 to 10^29 seconds across 1 MeV to 2 TeV masses.

  5. Constraints on dark matter annihilation in the Large Magellanic Cloud from multiple low-frequency radio observations

    astro-ph.HE 2024-12 reject novelty 3.0 of 10

    Fitting LMC low-frequency radio data with a dark matter plus cosmic-ray double power-law model yields dark-matter flux limits of 98.4 to 114.8 Jy at 1.4 GHz, which translate to annihilation cross-section bounds above ...

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