Possibility of Precise Measurement of the Cosmological Power Spectrum With a Dedicated 21cm Survey After Reionization

Abstract

Measurements of the 21cm line emission by residual cosmic hydrogen after reionization can be used to trace the power spectrum of density perturbations through a significant fraction of the observable volume of the Universe. We show that a dedicated 21cm observatory coule probe a number of independent modes that is two orders of magnitude larger than currently available, and enable a cosmic-variance limited detection of the signature of a neutrino mass ~0.05eV. The evolution of the linear growth factor with redshift could also constrain exotic theories of gravity or dark energy to an unprecedented precision.

4 pages, 3 figures, Accepted for publication in Physical Review Letters

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Cited by in corpus (27)

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• Late-time cosmology with 21cm intensity mapping experiments
• Canadian Hydrogen Intensity Mapping Experiment (CHIME) Pathfinder
• Evolution of the 21 cm signal throughout cosmic history
• Blind foreground subtraction for intensity mapping experiments
• The Fast Fourier Transform Telescope
• Modeling the neutral hydrogen distribution in the post-reionization Universe: intensity mapping
• Fast simulations for intensity mapping experiments
• Baryonic acoustic oscillations from 21cm intensity mapping: the Square Kilometre Array case
• Constraining massive neutrinos using cosmological 21 cm observations
• First Detection of Cosmic Structure in the 21-cm Intensity Field
• Cosmological constraints from 21cm surveys after reionization
• Probing small-scale cosmological fluctuations with the 21 cm forest: effects of neutrino mass, running spectral index and warm dark matter
• Cosmological parameter forecasts for HI intensity mapping experiments using the angular power spectrum
• Studying 21cm power spectrum with one-point statistics
• Model independent constraints on mass-varying neutrino scenarios
• Modelling redshift-space distortion in the post-reionization $\mathrm{HI}$ 21-cm power spectrum
• 21 cm Intensity Mapping
• Redshift space distortions of the {\rm HI} 21-cm intensity mapping signal due to the internal motions within galaxies
• Accurate Polarization Calibration at 800 MHz with the Green Bank Telescope
• Simulated foreground predictions for HI at z = 3.35 with the Ooty Wide Field Array: I. Instrument and the foregrounds
• Fisher Matrix Based Predictions for Measuring the z = 3.35 Binned 21-cm Power Spectrum using the Ooty Wide Field Array (OWFA)
• An analytical method to simulate the HI 21-cm visibility signal for intensity mapping experiments
• The redshifted HI 21 cm signal from the post-reionization epoch: Cross-correlations with other cosmological probes
• Let there be Light: the Emergence of Structure out of the Dark Ages in the Early Universe
• Elucidating Dark Energy with Future 21 cm Observations at the Epoch of Reionization
• Gravitational Wave Detection Using Redshifted 21-cm Observations