Unveiling the nature of dark matter with high redshift 21 cm line experiments

  title={Unveiling the nature of dark matter with high redshift 21 cm line experiments},
  author={Carmelo Evoli and Andrei Mesinger and Andrea Ferrara},
  journal={Journal of Cosmology and Astroparticle Physics},
  pages={024 - 024}
Observations of the redshifted 21 cm line from neutral hydrogen will open a new window on the early Universe. By influencing the thermal and ionization history of the intergalactic medium (IGM), annihilating dark matter (DM) can leave a detectable imprint in the 21 cm signal. Building on the publicly available 21cmFAST code, we compute the 21 cm signal for a 10 GeV WIMP DM candidate. The most pronounced role of DM annihilations is in heating the IGM earlier and more uniformly than astrophysical… 
Lux Ex Tenebris: The Imprint of Annihilating Dark Matter on the Intergalactic Medium during Cosmic Dawn
Upcoming measurements of the highly redshifted 21 cm line with next-generation radio telescopes such as the Hydrogen Epoch of Reionization Array (HERA) and Square Kilometer Array will provide the
Dark Matter annihilations in halos and high-redshift sources of reionization of the universe
It is well known that annihilations in the homogeneous fluid of dark matter (DM) can leave imprints in the cosmic microwave background (CMB) anisotropy power spectrum. However, the relevance of DM
The 21 cm signal and the interplay between dark matter annihilations and astrophysical processes
Future dedicated radio interferometers, including HERA and SKA, are very promising tools that aim to study the epoch of reionization and beyond via measurements of the 21 cm signal from neutral
Implications of a 21-cm signal for dark matter annihilation and decay
Measurements of the temperature of the baryons at the end of the cosmic dark ages can potentially set very precise constraints on energy injection from exotic sources, such as annihilation or decay
HERA Phase I Limits on the Cosmic 21 cm Signal: Constraints on Astrophysics and Cosmology during the Epoch of Reionization
Recently, the Hydrogen Epoch of Reionization Array (HERA) has produced the experiment’s first upper limits on the power spectrum of 21 cm fluctuations at z ∼ 8 and 10. Here, we use several
Dark matter-baryon scattering effects on temperature perturbations and implications for cosmic dawn
. The nature of dark matter remains unknown, but upcoming measurements probing the high-redshift Universe may provide invaluable insight. In the presence of dark matter-baryon scattering, the
Warm dark matter signatures on the 21cm power spectrum: intensity mapping forecasts for SKA
We investigate the impact that warm dark matter (WDM) has in terms of 21 cm intensity mapping in the post-reionization Universe at z=3−5. We perform hydrodynamic simulations for 5 different models:
Emulating the global 21-cm signal from Cosmic Dawn and Reionization
The 21-cm signal of neutral hydrogen is a sensitive probe of the Epoch of Reionization (EoR), Cosmic Dawn, and the Dark Ages. Currently, operating radio telescopes have ushered in a data-driven era
Global 21-cm Cosmology from the Farside of the Moon
Focus Area 1: lunar farside radio telescope to explore the early universe We describe how to open one of the last unexplored windows to the cosmos, the Dark Ages and Cosmic Dawn, using a simple low
A tale of two sites – II. Inferring the properties of minihalo-hosted galaxies with upcoming 21-cm interferometers
The first generation of galaxies is expected to form in minihalos, accreting gas through ${\rm H}_2$ cooling, and possessing unique properties. Although unlikely to be directly detected in


The nature of dark matter from the global high-redshift H i 21 cm signal
We study the imprint of dark matter (DM) annihilation on the global 21 cm signal from the Dark Ages to Cosmic Reionization. Motivated by recent observations, we focus on three DM candidates: (i) a 10
The imprint of warm dark matter on the cosmological 21-cm signal
We investigate the effects of warm dark matter (WDM) on the cosmic 21-cm signal. If dark matter exists as WDM instead of cold dark matter (CDM), its non-negligible velocities can inhibit the
The X-ray spectra of the first galaxies: 21 cm signatures
The cosmological 21cm signal is a physics-rich probe of the early Universe, encoding information about both the ionization and the thermal history of the intergalactic medium (IGM). The latter is
Constraints on Dark Matter annihilations from reionization and heating of the intergalactic gas
Dark Matter annihilations after recombination and during the epoch of structure formation deposit energy in the primordial intergalactic medium, producing reionization and heating. We investigate the
Reionization and beyond: detecting the peaks of the cosmological 21 cm signal
[ABRIDGED] The cosmological 21cm signal is set to become the most powerful probe of the early Universe, with first generation interferometers aiming to make statistical detections of reionization.
Constraints on Warm Dark Matter from Cosmological Reionization
We study the constraints that high-redshift structure formation in the universe places on warm dark matter (WDM) dominated cosmological models. We modify the extended Press-Schechter formalism to
CMB constraints on WIMP annihilation: Energy absorption during the recombination epoch
We compute in detail the rate at which energy injected by dark matter (DM) annihilation heats and ionizes the photon-baryon plasma at z{approx}1000, and provide accurate fitting functions over the
We present new observations with the Precision Array for Probing the Epoch of Reionization with the aim of measuring the properties of foreground emission for 21 cm epoch of reionization (EoR)
Detecting the Earliest Galaxies through Two New Sources of 21 Centimeter Fluctuations
The first galaxies that formed at a redshift z ~ 20-30 emitted continuum photons with energies between the Lyα and Lyman limit wavelengths of hydrogen, to which the neutral universe was transparent