Radio bounds on the mixed dark matter scenarios of primordial black holes and WIMPs

Abstract

We study the synchrotron radio emission in the mixed dark matter scenarios consisting of the primordial black holes (PBHs) and the self-annihilating WIMPs (weakly interacting massive particles). The WIMPs can form the ultracompact minihalos around PBHs and the annihilation enhancement from these dense halos can lead to the efficient synchrotron radiation at the radio frequency in the presence of galactic magnetic fields. The upper bound of PBH fraction with respect to the total dark matter abundance is of order $10^{-8}\sim 10^{-5}$ depending on the electroweak scale WIMP mass ($m_{\chi }=10\sim 1000$ GeV) and the WIMP annihilation channel (e.g. a hadronic $\chi \chi \to b\bar{b}$ or a leptonic $\chi \chi \to e^{+}{e}^{-}$ channel). The PBH contribution to the total dark matter abundance is hence negligible when the other component of dark matter is composed of the conventional electroweak scale WIMPs.

10 pages, 4 figures

References in corpus (39)

• Constraints on Primordial Black Holes
• Primordial Black Holes as Dark Matter: Recent Developments
• Primordial Black Holes as a dark matter candidate
• Radio observational constraints on Galactic 3D-emission models
• Disruption of Dark Matter Substructure: Fact or Fiction?
• Cosmic microwave background bounds on primordial black holes including dark matter halo accretion
• Gamma-ray and radio tests of the e+e- excess from DM annihilations
• What mass are the smallest protohalos?
• Effects of cold dark matter decoupling and pair annihilation on cosmological perturbations
• Detecting dark matter WIMPs in the Draco dwarf: a multi-wavelength perspective
• Testing scenarios of primordial black holes being the seeds of supermassive black holes by ultracompact minihalos and CMB $\mu$-distortions
• All-sky Galactic radiation at 45 MHz and spectral index between 45 and 408 MHz
• Multi-wavelength signals of dark matter annihilations at the Galactic center
• The survival and disruption of CDM micro-haloes: implications for direct and indirect detection experiments
• Galactic Center Gamma-Ray Excess from Dark Matter Annihilation: Is There A Black Hole Spike?
• Constraints on decaying dark matter from the extragalactic gamma-ray background
• Remnants of dark matter clumps
• Probing Dark Low-mass Halos and Primordial Black Holes with Frequency-dependent Gravitational Lensing Dispersions of Gravitational Waves
• Dark Matter Density Spikes around Primordial Black Holes
• Black Holes and WIMPs: All or Nothing or Something Else
• The tidal evolution of dark matter substructure -- I. Subhalo density profiles
• Dark matter annihilation near a black hole: plateau vs. weak cusp
• On mini-halo encounters with stars
• Radio constraints on dark matter annihilation in the galactic halo and its substructures
• In-depth analysis of the clustering of dark matter particles around primordial black holes I: density profiles
• Constraints on a mixed model of dark matter particles and primordial black holes from the Galactic 511 keV line
• Superdense cosmological dark matter clumps
• Constraining Primordial Black Hole Fraction at the Galactic Centre using radio observational data
• Search for gamma-ray emission from $p$-wave dark matter annihilation in the Galactic Center
• Background of radio photons from primordial black holes
• Constraining Mixed Dark-Matter Scenarios of WIMPs and Primordial Black Holes from CMB and 21-cm observations
• Constraints on MeV dark matter and primordial black holes: Inverse Compton signals at the SKA
• Shining Primordial Black Holes
• The abundance of primordial black holes from the global 21cm signal and extragalactic gamma-ray background
• Primordial Black Hole as a Source of the Boost Factor
• Primordial black hole dark matter in the presence of p-wave WIMP annihilation
• Boosting small-scale structure via primordial black holes and implications for sub-GeV dark matter annihilation
• CMB and 21cm bounds on early structure formation boosted by primordial black hole entropy fluctuations
• Discriminating and Constraining the Synchrotron and Inverse Compton Radiations from Primordial Black Hole and Dark Matter at the Galactic Centre Region

Cited by in corpus (3)

• Observational Evidence for Primordial Black Holes: A Positivist Perspective
• Improved Constraints on Dark Matter Annihilations Around Primordial Black Holes
• Constraining the Coexistence of Freeze-in Dark Matter and Primordial Black Holes