Constraining DM through 21 cm observations

Abstract

Beyond reionization epoch cosmic hydrogen is neutral and can be directly observed through its 21 cm line signal. If dark matter (DM) decays or annihilates the corresponding energy input affects the hydrogen kinetic temperature and ionized fraction, and contributes to the Ly_alpha background. The changes induced by these processes on the 21 cm signal can then be used to constrain the proposed DM candidates, among which we select the three most popular ones: (i) 25-keV decaying sterile neutrinos, (ii) 10-MeV decaying light dark matter (LDM) and (iii) 10-MeV annihilating LDM. Although we find that the DM effects are considerably smaller than found by previous studies (due to a more physical description of the energy transfer from DM to the gas), we conclude that combined observations of the 21 cm background and of its gradient should be able to put constrains at least on LDM candidates. In fact, LDM decays (annihilations) induce differential brightness temperature variations with respect to the non decaying/annihilating DM case up to Delta_delta T_b=8 (22) mK at about 50 (15) MHz. In principle this signal could be detected both by current single dish radio telescopes and future facilities as LOFAR; however, this assumes that ionospheric, interference and foreground issues can be properly taken care of.

9 pages, submitted to MNRAS

References in corpus (37)

• 21-cm Tomography of the Intergalactic Medium at High Redshift
• Neutrinos in cosmology
• A New Calculation of the Recombination Epoch
• 21 Centimeter Fluctuations from Cosmic Gas at High Redshifts
• Particle decays during the cosmic dark ages
• The all-sky distribution of 511 keV electron-positron annihilation emission
• Direct Detection of Warm Dark Matter in the X-ray
• Multifrequency analysis of 21 cm fluctuations from the Era of Reionization
• The Global 21 Centimeter Background from High Redshifts
• Wouthuysen-Field coupling strength and application to high-redshift 21 cm radiation
• The Spin-Kinetic Temperature Coupling and the Heating Rate due to Lyman Alpha Scattering before Reionization: Predictions for 21cm Emission and Absorption
• Probing Beyond the Epoch of Hydrogen Reionization with 21 Centimeter Radiation
• Fossil HII Regions: Self-Limiting Star Formation at High Redshift
• Stringent Constraint on Galactic Positron Production
• Gamma-Ray Constraint on Galactic Positron Production by MeV Dark Matter
• Constraints on sterile neutrino as a dark matter candidate from the diffuse X-ray background
• Impact of dark matter decays and annihilations on reionization
• Relic keV sterile neutrinos and reionization
• The Spin Temperature of Warm Interstellar H I
• Direct X-ray Constraints on Sterile Neutrino Warm Dark Matter
• Constraints on Sterile Neutrino Dark Matter
• The Sensitivity of First Generation Epoch of Reionization Observatories and Their Potential for Differentiating Theoretical Power Spectra
• Redshifted 21 cm Emission From the Pre-Reionization Era I. Mean Signal and Linear Fluctuations
• Foregrounds for 21cm Observations of Neutral Gas at High Redshift
• The Effects of Dark Matter Decay and Annihilation on the High-Redshift 21 cm Background
• Improving Foreground Subtraction in Statistical Observations of 21 cm Emission from the Epoch of Reionization
• Do We Need Stars to Reionize the Universe at High Redshifts? Early Reionization by Decaying Heavy Sterile Neutrinos
• The 21 centimeter emission from the reionization epoch: extended and point source foregrounds
• The impacts of dark matter particle annihilation on recombination and the anisotropies of the cosmic microwave background
• Restrictions on parameters of sterile neutrino dark matter from observations of galaxy clusters
• The impact of dark matter decays and annihilations on the formation of the first structures
• Decaying particles and the reionization history of the Universe
• Prospects for Redshifted 21-cm observations of quasar HII regions
• Background radiation from sterile neutrino decay and reionization
• Intergalactic medium heating by dark matter
• Large-Scale Power Spectrum and Cosmological Parameters from SFI Peculiar Velocities
• Searching for Early Ionization with the Primeval Structure Telescope

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• Indirect Dark Matter Signatures in the Cosmic Dark Ages II. Ionization, Heating and Photon Production from Arbitrary Energy Injections
• The 21cm angular-power spectrum from the dark ages
• The Darkest Hour Before Dawn: Contributions to Cosmic Reionization from Dark Matter Annihilation and Decay
• Contraints on radiative dark-matter decay from the cosmic microwave background
• Energy Injection And Absorption In The Cosmic Dark Ages
• The Fast Fourier Transform Telescope
• Too Hot, Too Cold or Just Right? Implications of a 21-cm Signal for Dark Matter Annihilation and Decay
• Astrophysical and Cosmological Implications of Large Volume String Compactifications
• WMAP7 and future CMB constraints on annihilating dark matter: implications for GeV-scale WIMPs
• Bayesian constraints on the global 21-cm signal from the Cosmic Dawn
• Constraining primordial black holes as dark matter using the global 21-cm signal with X-ray heating and excess radio background
• Relic Abundance of Asymmetric Dark Matter
• Strong Upper Limits on Sterile Neutrino Warm Dark Matter
• Foreground Model and Antenna Calibration Errors in the Measurement of the Sky-Averaged λ21 cm Signal at z~20
• Status, Challenges and Directions in Indirect Dark Matter Searches
• Dark matter annihilation effects on the first stars
• The 21cm Signature of the First Stars
• The nature of dark matter from the global high redshift HI 21 cm signal
• X-ray photons from late-decaying majoron dark matter
• The 21 cm signal and the interplay between dark matter annihilations and astrophysical processes
• Dark matter annihilation and its effect on CMB and Hydrogen 21 cm observations
• Detection and extraction of signals from the epoch of reionization using higher order one-point statistics
• First star formation with dark matter annihilation
• The Energy Cascade from Warm Dark Matter Decays
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• Cosmological Implications of High-Energy Neutrino Emission from the Decay of Long-Lived Particle
• Warm dark matter and the ionization history of the Universe
• Impact of Dark Matter Annihilation on the High-Redshift Intergalactic Medium
• Dark stars: Implications and constraints from cosmic reionization and extragalactic background radiation
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• Cosmic (super)string constraints from 21 cm radiation
• Galactic Signatures of Decaying Dark Matter
• Lyalpha versus X-ray heating in the high-z IGM
• Signatures of clumpy dark matter in the global 21 cm background signal
• CMB and 21-cm Signals for Dark Matter with a Long-Lived Excited State
• Contributions of dark matter annihilation to the global 21cm spectrum observed by the EDGES experiment
• Particle energy cascade in the Intergalactic Medium
• CMB and Lyman-$\alpha$ constraints on dark matter decays to photons
• Radiation from early black holes - I: effects on the neutral inter-galactic medium
• Constraining Mixed Dark-Matter Scenarios of WIMPs and Primordial Black Holes from CMB and 21-cm observations
• Lyalpha heating and its impact on early structure formation
• Green Peas in X-rays
• Perturbed Recombination from Dark Matter Annihilation
• Detectable Signatures of Cosmic Radiative Feedback
• Cosmic microwave background constraints on light dark matter candidates
• Pressure from dark matter annihilation and the rotation curve of spiral galaxies
• Enlightening the dark ages with dark matter
• Enhanced n-body annihilation of dark matter and its indirect signatures
• Dark Matter annihilation energy output and its effects on the high-z IGM
• Impact of radiation from primordial black holes on the 21-cm angular-power spectrum in the dark ages
• Perturbed recombination from inhomogeneous photon injection and application to accreting primordial black holes
• The Effects of Dark Matter Annihilation on Cosmic Reionization
• 21-cm Constraints on Dark Matter Annihilation after an Early Matter-Dominated Era
• Growth problems of stellar black holes in early galaxies
• Perspectives on fundamental cosmology from Low Earth Orbit and the Moon
• The Hydrogen Mixing Portal, Its Origins, and Its Cosmological Effects
• Multi-Component Dark Matter from Minimal Flavor Violation
• Astrophysical uncertainties challenge 21-cm forecasts: A primordial black hole case study
• Influence of the deviation of the matter power spectrum at small scales on the global 21-cm signal at cosmic dawn
• Dark Matter Energy Deposition and Production from the Table-Top to the Cosmos
• Bounds on Dark Matter Annihilation Cross-sections from Inert Doublet Model in the context of 21 cm Cosmology of Dark Ages