Prospects for probing dark matter particles and primordial black holes with the Hongmeng mission using the 21 cm global spectrum at cosmic dawn

Abstract

Probing dark matter particles and primordial black holes remains a pivotal challenge in modern cosmology. Exotic energy injections from dark matter annihilation, decay, and PBH Hawking evaporation can alter the thermal and ionization histories of the early universe, leaving distinctive imprints on the 21 cm global spectrum. We assess the potential of the upcoming space project, the Hongmeng mission, to probe dark matter particles and PBHs using the 21 cm global spectrum. Under ideal conditions with 1000 hours of integration time and negligible foreground residuals, the Hongmeng project can reach sensitivities to dark matter annihilation cross sections and decay lifetimes to $⟨\sigma v⟩\sim 10^{-28}\mathrm{c}{\mathrm{m}}^3{\mathrm{s}}^{-1}$ and $\tau \sim 10^{28}\mathrm{s}$, respectively, for dark matter particles with a mass of $10\mathrm{GeV}$. It can also probe PBHs with masses of $10^{16}\mathrm{g}$ and abundances as low as $f_{\mathrm{PBH}}\simeq 10^{-6}$. These results indicate that the Hongmeng mission can improve current constraints on dark matter annihilation, decay, and PBH Hawking radiation by nearly two orders of magnitude. Moreover, the Hongmeng mission surpasses current limits on sub-GeV dark matter probing and enables the probing of Hawking radiation from PBHs with masses above $10^{17}\mathrm{g}$, which remain undetectable through conventional cosmological means. Overall, the upcoming Hongmeng project holds great promise for advancing the investigation of both dark matter and PBHs, potentially deepening our understanding of the nature of dark matter.

26 pages, 11 figures

References in corpus (27)

• Cosmology at Low Frequencies: The 21 cm Transition and the High-Redshift Universe
• Dark Matter Candidates from Particle Physics and Methods of Detection
• Precise Relic WIMP Abundance and its Impact on Searches for Dark Matter Annihilation
• Searching for Dark Matter Annihilation in Recently Discovered Milky Way Satellites with Fermi-LAT
• CMB Constraints on WIMP Annihilation: Energy Absorption During the Recombination Epoch
• CMB bounds on disk-accreting massive Primordial Black Holes
• General Constraints on Dark Matter Decay from the Cosmic Microwave Background
• Search for photon line-like signatures from Dark Matter annihilations with H.E.S.S
• Cosmological constraints on exotic injection of electromagnetic energy
• Primordial Black Holes as Dark Matter Candidates
• Science with a lunar low-frequency array: from the dark ages of the Universe to nearby exoplanets
• Constraining primordial black holes as dark matter using the global 21-cm signal with X-ray heating and excess radio background
• Search for dark matter annihilation signatures in H.E.S.S. observations of Dwarf Spheroidal Galaxies
• Astrophysical Constraints from the SARAS3 non-detection of the Cosmic Dawn Sky-Averaged 21-cm Signal
• Thermalization of large energy release in the early Universe
• Constraints on light decaying dark matter candidates from 16 years of INTEGRAL/SPI observations
• 21-cm constraints on spinning primordial black holes
• Strong Optimized Conservative Fermi-LAT Constraints on Dark Matter Models from the Inclusive Photon Spectrum
• CMB and Lyman-$\alpha$ constraints on dark matter decays to photons
• 21cm signal sensitivity to dark matter decay
• A Search for Dark Matter Lines at the Galactic Center with 14 Years of Fermi Data
• The 21-cm forest as a simultaneous probe of dark matter and cosmic heating history
• Extracting the Global 21-cm signal from Cosmic Dawn and Epoch of Reionization in the presence of Foreground and Ionosphere
• X-rays constraints on sub-GeV Dark Matter
• Cosmological boost factor for dark matter annihilation at redshifts of $z=10$-$100$ using the power spectrum approach
• Global signal in the redshifted hydrogen 21-cm line from the Dark Ages and Cosmic Dawn: Dependence on the nature of dark matter and modeling of first light
• Dark matter search with CMB: a study of foregrounds

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