Galaxy clusters in high definition: a dark matter search
arXiv:2210.00796 · doi:10.1103/PhysRevD.107.023006
Abstract
Recent radio-frequency probes, with the ATCA and ASKAP telescopes, have proven themselves to be at the forefront of placing indirect limits on the properties of dark matter. The latter being able to substantially exceed the constraining power of Fermi-LAT data. However, these observations were based only on dwarf galaxies, where magnetic field uncertainties are large. Here we re-examine the case for galaxy clusters, often ignored due to substantial diffuse radio backgrounds, by considering the extrapolation of known cluster surface brightness profiles down to scales observable with MeerKAT. Despite large baryonic backgrounds, we find that clusters can be competitive with dwarf galaxies. Extrapolated Coma data being able to rule out WIMPs of mass GeV annihilating via -quarks. This is while having lesser uncertainties surrounding the magnetic field and diffusive environment. Such compelling results are possible due to a clash between the inner shape of the dark matter halo and the flat inner profile of radio halos which is most pronounced for NFW-like Einasto profiles, the presence of which having some supporting evidence in the literature.
arXiv comment13 pages, 13 figures, 2 tables
References in corpus (37)
- The Structure of Cold Dark Matter Halos
- Propagation of cosmic-ray nucleons in the Galaxy
- Analytical Models For Galactic Nuclei
- Searching for Dark Matter Annihilation in Recently Discovered Milky Way Satellites with Fermi-LAT
- The Coma cluster magnetic field from Faraday rotation measures
- Positron Propagation and Fluxes from Neutralino Annihilation in the Halo
- Dark matter distribution in the Coma cluster from galaxy kinematics: breaking the mass-anisotropy degeneracy
- The Density Profiles of Massive, Relaxed Galaxy Clusters. II. Separating Luminous and Dark Matter in Cluster Cores
- Statistics of X-ray observables for the cooling-core and non-cooling core galaxy clusters
- Multi-frequency analysis of neutralino dark matter annihilations in the Coma cluster
- The diffuse radio emission from the Coma cluster at 2.675 GHz and 4.85 GHz
- Diffuse Radio Emission in/around the Coma Cluster: Beyond Simple Accretion
- Characterization of subhalo structural properties and implications for dark matter annihilation signals
- The MeerKAT Galaxy Cluster Legacy Survey I. Survey Overview and Highlights
- Comparative analysis of the diffuse radio emission in the galaxy clusters A1835, A2029, and Ophiuchus
- A Global Analysis of Dark Matter Signals from 27 Dwarf Spheroidal Galaxies using 11 Years of Fermi-LAT Observations
- On the Physics of Radio Halos in Galaxy Clusters: Scaling Relations and Luminosity Functions
- Diffuse inverse Compton and synchrotron emission from dark matter annihilations in galactic satellites
- Statistics of Dark Matter Substructure: III. Halo-to-Halo Variance
- The EMU view of the Large Magellanic Cloud: Troubles for sub-TeV WIMPs
- Structural and dynamical modeling of WINGS clusters. II. The orbital anisotropies of elliptical, spiral and lenticular galaxies
- The non-thermal radiation - Cluster merger connection
- Dark matter in the Reticulum II dSph: a radio search
- Superluminal problem in diffusion of relativistic particles and its phenomenological solution
- Local Group dSph radio survey with ATCA (II): Non-thermal diffuse emission
- Local Group dSph radio survey with ATCA (III): Constraints on Particle Dark Matter
- GMRT observations of the Ophiuchus galaxy cluster
- Evolution of Dark Matter Halos and their Radio Emissions
- Constraining the inner density slope of massive galaxy clusters
- A Multi-frequency analysis of dark matter annihilation interpretations of recent anti-particle and gamma-ray excesses in cosmic structures
- Core or cusps: The central dark matter profile of a redshift one strong lensing cluster with a bright central image
- Radio constraints on dark matter annihilation in Canes Venatici I with LOFAR
- Annihilating Dark Matter Search with 12 Years of Fermi LAT Data in Nearby Galaxy Clusters
- Ophiuchus: an optical view of a very massive cluster of galaxies hidden behind the Milky Way
- Stringent constraint on the radio signal from dark matter annihilation in dwarf spheroidal galaxies using the TGSS
- Searching for Dark Matter Signals from Local Dwarf Spheroidal Galaxies at Low Radio Frequencies in the GLEAM Survey
- An excess of excesses examined via dark matter radio emissions from galaxies