REVIEW 4 cited by
Closing the window on fuzzy dark matter with the 21cm signal
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
abstract
Fuzzy dark matter (FDM) is a well motivated candidate for dark matter (DM) as its tiny mass and large de-Broglie wavelength suppress small-scale matter fluctuations, thereby solving some of the small-scale discrepancies in $\Lambda$CDM. Although it has been ruled out as the single component of DM by several observables, there is still a region in the FDM parameter space (the "FDM window", $10^{-25}\,\mathrm{eV}\lesssim m_\mathrm{FDM}\lesssim10^{-23}\,\mathrm{eV}$) where FDM is allowed to comprise a large portion of the total DM. In this work, for the first time, we study the signature of FDM (comprised of ultra-light axions) in fractions less than unity on the 21cm signal and its detectability by 21cm interferometers such as HERA, taking into account the degeneracy with both astrophysical and cosmological parameters, using a new pipeline that combines modified versions of the CAMB and 21cmFAST codes. Our forecasts imply that HERA in its design performance will be sensitive to FDM fractions as small as 1% in the FDM window, and improve over existing bounds for other masses by up to an order of magnitude.
Forward citations
Cited by 4 Pith papers
-
Fuzzy Axions and Associated Relics
In explicit string theory compactifications, fuzzy axion dark matter is rare and typically requires fine-tuning of initial axion displacements or a non-standard reheating epoch to avoid overproducing heavier axions.
-
Wavelet-Scattering Signatures of Fuzzy Dark Matter in Simulated 21 cm Brightness-Temperature Maps
Wavelet scattering coefficients S1 and R=S2/S1 of simulated 21 cm maps distinguish fuzzy dark matter from CDM and survive SKA1-Low-style thermal noise, though abstract-level Fisher-forecast claims are absent from the body.
-
Probing Long-Range Forces Between Neutrinos with Cosmic Structures
Neutrino long-range forces stronger than gravity would make the cosmic neutrino background collapse into bound states, and existing matter power spectrum and reionization data now exclude a band of couplings for force...
-
Risk-based framework to determine climate-informed design storms for road drainage infrastructure
A risk-index method combining climate projections, physiographic hazard, and socioeconomic vulnerability scales future design storms for Ontario road drainage.
Discussion (0). Continue with ORCID to comment.