A new target object for constraining annihilating dark matter

Abstract

In the past decade, gamma-ray observations and radio observations of our Milky Way and the Milky Way dwarf spheroidal satellite galaxies put very strong constraints on annihilation cross sections of dark matter. In this article, we suggest a new target object (NGC 2976) that can be used for constraining annihilating dark matter. The radio and x-ray data of NGC 2976 can put very tight constraints on the leptophilic channels of dark matter annihilation. The lower limits of dark matter mass annihilating via $e^{+}{e}^{-}$, ${\mu }^{+}{\mu }^{-}$ and ${\tau }^{+}{\tau }^{-}$ channels are 200 GeV, 130 GeV and 110 GeV respectively with the canonical thermal relic cross section. We suggest that this kind of large nearby dwarf galaxies with relatively high magnetic field can be good candidates for constraining annihilating dark matter in future analysis.

Accepted for publication in The Astrophysical Journal

References in corpus (28)

• SINGS: The SIRTF Nearby Galaxies Survey
• Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi-LAT Data
• Precise Relic WIMP Abundance and its Impact on Searches for Dark Matter Annihilation
• The Characterization of the Gamma-Ray Signal from the Central Milky Way: A Compelling Case for Annihilating Dark Matter
• Searching for Dark Matter Annihilation in Recently Discovered Milky Way Satellites with Fermi-LAT
• Dark Matter Constraints from Observations of 25 Milky Way Satellite Galaxies with the Fermi Large Area Telescope
• Astrophysical and Dark Matter Interpretations of Extended Gamma-Ray Emission from the Galactic Center
• A Tale of Tails: Dark Matter Interpretations of the Fermi GeV Excess in Light of Background Model Systematics
• Multi-frequency analysis of neutralino dark matter annihilations in the Coma cluster
• Gamma-ray and radio tests of the e+e- excess from DM annihilations
• Characterization of subhalo structural properties and implications for dark matter annihilation signals
• Detecting dark matter WIMPs in the Draco dwarf: a multi-wavelength perspective
• A Comprehensive Search for Dark Matter Annihilation in Dwarf Galaxies
• A new look at the cosmic ray positron fraction
• Gravitational Radiation from First-Order Phase Transitions
• Discovery of Nuclear X-ray Sources in SINGS Galaxies
• Search for gamma-ray emission from eight dwarf spheroidal galaxy candidates discovered in Year Two of Dark Energy Survey with Fermi-LAT data
• Bright gamma-ray Galactic Center excess and dark dwarfs: Strong tension for dark matter annihilation despite Milky Way halo profile
• 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
• The central dark matter distribution of NGC 2976
• Synchrotron Emission from Dark Matter Annihilation: Predictions for Constraints from Non-detections of Galaxy Clusters with New Radio Surveys
• A Critical Reevaluation of Radio Constraints on Annihilating Dark Matter
• A Multi-frequency analysis of dark matter annihilation interpretations of recent anti-particle and gamma-ray excesses in cosmic structures
• Updated galactic radio constraints on Dark Matter
• Revisiting the constraints on annihilating dark matter by radio observational data of M31
• Seeking large-scale magnetic fields in a pure-disk dwarf galaxy NGC 2976

Cited by in corpus (8)

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• Ruling out $\sim 100-300$ GeV thermal relic annihilating dark matter by radio observation of the Andromeda galaxy
• Constraining annihilating dark matter mass by the radio continuum spectral data of NGC4214 galaxy
• Bose-Einstein Condensate dark matter models in the presence of baryonic matter and random confining potentials
• Origin of the DAMPE 1.4 TeV peak
• Constraining annihilating dark matter by radio continuum spectrum of the Large Magellanic Cloud
• Constraining the population of intermediate mass black holes by gamma-ray data of the Fornax cluster