Radio emission from dark matter annihilation in the Large Magellanic Cloud

Abstract

The Large Magellanic Cloud, at only 50 kpc away from us and known to be dark matter dominated, is clearly an interesting place where to search for dark matter annihilation signals. In this paper, we estimate the synchrotron emission due to WIMP annihilation in the halo of the LMC at two radio frequencies, 1.4 and 4.8 GHz, and compare it to the observed emission, in order to impose constraints in the WIMP mass vs. annihilation cross section plane. We use available Faraday rotation data from background sources to estimate the magnitude of the magnetic field in different regions of the LMC's disc, where we calculate the radio signal due to dark matter annihilation. We account for the e+ e- energy losses due to synchrotron, Inverse Compton Scattering and bremsstrahlung, using the observed hydrogen and dust temperature distribution on the LMC to estimate their efficiency. The extensive use of observations, allied with conservative choices adopted in all the steps of the calculation, allow us to obtain very realistic constraints.

arXiv comment9 pages, 7 figures

References in corpus (37)

• The Structure of Cold Dark Matter Halos
• Observation of an anomalous positron abundance in the cosmic radiation
• Dark Matter Candidates from Particle Physics and Methods of Detection
• The Structure of Dark Matter Haloes in Dwarf Galaxies
• Cold collapse and the core catastrophe
• Simulations of X-ray Clusters
• The Inner Structure of LambdaCDM Halos III: Universality and Asymptotic Slopes
• Measurement of the Cosmic Ray e+ plus e- spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope
• Photoelectric Emission from Interstellar Dust: Grain Charging and Gas Heating
• Probing the ATIC peak in the cosmic-ray electron spectrum with H.E.S.S
• The Structural Evolution of Substructure
• Magellanic Cloud Structure from Near-IR Surveys I: The Viewing Angles of the LMC
• Galactic and extragalactic magnetic fields
• Observations of Milky Way Dwarf Spheroidal galaxies with the Fermi-LAT detector and constraints on Dark Matter models
• Multi-frequency analysis of neutralino dark matter annihilations in the Coma cluster
• Dark Matter Interpretations of the Electron/Positron Excesses after FERMI
• The magnetic field of the Large Magellanic Cloud revealed through Faraday rotation
• Dark matter interpretation of recent electron and positron data
• Detecting dark matter WIMPs in the Draco dwarf: a multi-wavelength perspective
• A Review of the Distance and Structure of the Large Magellanic Cloud
• The Rotation Curve of the Large Magellanic Cloud and the Implications for Microlensing
• Indirect Search for Neutralino Dark Matter with High Energy Neutrinos
• An ATCA 20cm Radio Continuum Study of the Large Magellanic Cloud
• Neutralino Annihilation at the Galactic Center Revisited
• Diffuse inverse Compton and synchrotron emission from dark matter annihilations in galactic satellites
• A 4.8- and 8.6-GHz Survey of the Large Magellanic Cloud: I The Images
• Radio Pulsars in the Magellanic Clouds
• Radio and gamma-ray constraints on dark matter annihilation in the Galactic center
• Radio constraints on dark matter annihilation in the galactic halo and its substructures
• Detecting WIMPs in the Microwave Sky
• Gamma-ray and synchrotron emission from neutralino annihilation in the Large Magellanic Cloud
• Constraining Supersymmetric Dark Matter With Synchrotron Measurements
• Dark Matter Signatures in the Anisotropic Radio Sky
• A Catalog of HI Clouds in the Large Magellanic Cloud
• X-ray Radiation from the Annihilation of Dark Matter at the Galactic Center
• Searching for Dark Matter in Messier 33
• Dark Matter Annihilations in the Large Magellanic Cloud

Cited by in corpus (18)

• A review of indirect searches for particle dark matter
• Testing the Dark Matter Scenario for PeV Neutrinos Observed in IceCube
• A local resolution of the Hubble tension: The impact of screened fifth forces on the cosmic distance ladder
• A Deep Search for Extended Radio Continuum Emission From Dwarf Spheroidal Galaxies: Implications for Particle Dark Matter
• The EMU view of the Large Magellanic Cloud: Troubles for sub-TeV WIMPs
• Galactic synchrotron emission from WIMPs at radio frequencies
• The Isotropic Radio Background and Annihilating Dark Matter
• Evolution of Dark Matter Halos and their Radio Emissions
• Updated galactic radio constraints on Dark Matter
• Constraints on dark matter annihilation from the FAST observation of the Coma Berenices dwarf galaxy
• An excess of excesses examined via dark matter radio emissions from galaxies
• Analysing the radio flux density profile of the M31 galaxy: a possible dark matter interpretation
• Constraining annihilating dark matter by radio continuum spectrum of the Large Magellanic Cloud
• Testing the dark matter origin of the WMAP-Planck Haze with radio observations of Spiral Galaxies
• Indirect detection prospects for d${}^{\ast }$(2380) dark matter
• A radio-frequency WIMP search with the MeerKAT Galaxy Cluster Legacy Survey
• Dark Matter constraints from Planck observations of the Galactic polarized synchrotron emission
• The Dark Matter Diffused Supernova Neutrino Background