Constraining annihilating dark matter by radio continuum spectrum of the Large Magellanic Cloud

Abstract

Recent radio observations have obtained stringent constraints for annihilating dark matter. In this article, we use the radio continuum spectral data of the Large Magellanic Cloud (LMC) to analyze the dark matter annihilation signals. We have discovered a slightly positive signal of dark matter annihilation with a $1.5\sigma$ statistical significance. The overall best-fit dark matter mass is $m_{\mathrm{DM}}\approx 90$ GeV, annihilating via $b\bar{b}$ channel. We have also constrained the $3\sigma$ lower limits of dark matter mass with the standard thermal dark matter annihilation cross section for the $e^{+}{e}^{-}$, ${\mu }^{+}{\mu }^{-}$, ${\tau }^{+}{\tau }^{-}$ and $b\bar{b}$ channels.

arXiv commentAccepted in ApJ

References in corpus (29)

• Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi-LAT Data
• PPPC 4 DM ID: A Poor Particle Physicist Cookbook for Dark Matter Indirect Detection
• Precise Relic WIMP Abundance and its Impact on Searches for Dark Matter Annihilation
• New Understanding of Large Magellanic Cloud Structure, Dynamics and Orbit from Carbon Star Kinematics
• WIMP dark matter candidates and searches - current status and future prospects
• Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons
• Searching for Dark Matter Annihilation in Recently Discovered Milky Way Satellites with Fermi-LAT
• The Structural Evolution of Substructure
• Multi-frequency analysis of neutralino dark matter annihilations in the Coma cluster
• Constraints on the Galactic Halo Dark Matter from Fermi-LAT Diffuse Measurements
• The magnetic field of the Large Magellanic Cloud revealed through Faraday rotation
• The diffuse radio emission from the Coma cluster at 2.675 GHz and 4.85 GHz
• A Robust Excess in the Cosmic-Ray Antiproton Spectrum: Implications for Annihilating Dark Matter
• 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
• The EMU view of the Large Magellanic Cloud: Troubles for sub-TeV WIMPs
• Searching for Dark Matter with X-ray Observations of Local Dwarf Galaxies
• Constraints on Dark Matter Annihilation in Clusters of Galaxies from Diffuse Radio Emission
• Constraints on dark matter annihilation by radio observations of M31
• Gamma-ray and synchrotron emission from neutralino annihilation in the Large Magellanic Cloud
• Evolution of Dark Matter Halos and their Radio Emissions
• Radio emission from dark matter annihilation in the Large Magellanic Cloud
• Constraints on dark matter annihilation in dwarf spheroidal galaxies from low frequency radio observations
• Universal profiles for radio searches of dark matter in dwarf galaxies
• Constraining annihilating dark matter mass by the radio continuum spectral data of NGC4214 galaxy
• GMRT radio continuum study of Wolf Rayet galaxies I: NGC 4214 and NGC 4449
• Reconciling the diffuse Galactic gamma-ray and the cosmic ray spectra
• A new target object for constraining annihilating dark matter
• Analysing the radio flux density profile of the M31 galaxy: a possible dark matter interpretation