Updated constraints on WIMP dark matter annihilation by radio observations of M31

Abstract

The present work derived the robust constraints on annihilating WIMP parameters utilizing new radio observations of M31, as well as new studies of its dark matter distribution and other properties. The characteristics of emission due to DM annihilation were computed in the frame of 2D galactic model employing GALPROP code adapted specifically for M31. This enabled us to refine various inaccuracies of previous studies on the subject. DM constraints were obtained for two representative annihilation channels: $\chi \chi \to b\overline{b}$ and $\chi \chi \to {\tau }^{+}{\tau }^{-}$. A wide variety of radio data was utilized in the frequency range $\approx$(0.1--10) GHz. As the result the thermal WIMP lighter than fiducially $\approx$ 70 GeV for $b\overline{b}$ channel and $\approx$ 40 GeV for ${\tau }^{+}{\tau }^{-}$ was excluded. The corresponding mass threshold uncertainty ranges were estimated to be 20--210 GeV and 18--89 GeV. The obtained exclusions are competitive to those from Fermi-LAT observations of dwarfs and AMS-02 measurements of antiprotons. Our constraints do not exclude the explanation of the gamma-ray outer halo of M31 and the Galactic center excess by annihilating DM. The thermal WIMP with $m_x\approx 70$ GeV, which explains the outer halo, would make a significant contribution to the non-thermal radio flux in M31 nucleus, fitting well both the spectrum and morphology. And, finally, we questioned the possibility claimed in other studies to robustly constrain heavy thermal WIMP with $m_x>100$ GeV by radio data on M31.

25 pages, 12 figures, 6 tables; accepted for publication in Phys. Rev. D; our DM addition for GALPROP is available at https://github.com/a-e-egorov/GALPROP_DM

References in corpus (27)

• The LOFAR Two-metre Sky Survey -- V. Second data release
• The VLA Low-frequency Sky Survey
• Search for dark matter annihilations towards the inner Galactic halo from 10 years of observations with H.E.S.S
• The Very Large Array Low-frequency Sky Survey Redux (VLSSr)
• Spatial distribution of interstellar gas in the innermost 3 kpc of our Galaxy
• The long bar as seen by the VVV survey: I. Colour-magnitude diagrams
• Galactic Substructure and Dark Matter Annihilation in the Milky Way Halo
• The LOFAR LBA Sky Survey I. survey description and preliminary data release
• Observations of M31 and M33 with the Fermi Large Area Telescope: a galactic center excess in Andromeda?
• The Return of the Templates: Revisiting the Galactic Center Excess with Multi-Messenger Observations
• A Revised LCDM Mass Model For The Andromeda Galaxy
• Precise WIMP Dark Matter Abundance and Standard Model Thermodynamics
• Magnetic field structures of galaxies derived from analysis of Faraday rotation measures, and perspectives for the SKA
• The Flattened Dark Matter Halo of M31 as Deduced from the Observed HI Scale Heights
• Power requirements for cosmic ray propagation models involving diffusive reacceleration; estimates and implications for the damping of interstellar turbulence
• A sub-2% Distance to M31 from Photometrically Homogeneous Near-Infrared Cepheid Period-Luminosity Relations Measured with the Hubble Space Telescope
• Combined searches for dark matter in dwarf spheroidal galaxies observed with the MAGIC telescopes, including new data from Coma Berenices and Draco
• Dark Matter Interpretation of the Fermi-LAT Observations Toward the Outer Halo of M31
• Les Houches Lectures on Indirect Detection of Dark Matter
• New minimal, median, and maximal propagation models for dark matter searches with Galactic cosmic rays
• Strong evidence of Anomalous Microwave Emission from the flux density spectrum of M31
• Ruling out $\sim 100-300$ GeV thermal relic annihilating dark matter by radio observation of the Andromeda galaxy
• The magnetic field structure of the central region in M31
• Magnetic fields and cosmic rays in M 31. I. Spectral indices, scale lengths, Faraday rotation, and magnetic field pattern
• The prolate dark matter halo of the Andromeda galaxy
• Study of the thermal and nonthermal emission components in M31: the Sardinia Radio Telescope view at 6.6 GHz
• Analysing the radio flux density profile of the M31 galaxy: a possible dark matter interpretation

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• Nature of M31 gamma-ray halo in relation to dark matter annihilation
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