Probing primordial non-Gaussianity with the power spectrum and bispectrum of future 21cm intensity maps
arXiv:2010.07034 · doi:10.1016/j.dark.2021.100821
Abstract
After reionisation, the 21cm emission line of neutral hydrogen within galaxies provides a tracer of dark matter. Next-generation intensity mapping surveys, with the SKA and other radio telescopes, will cover large sky areas and a wide range of redshifts, facilitating their use as probes of primordial non-Gaussianity. {Previous works have shown that the bispectrum can achieve tight constraints on primordial non-Gaussianity with future surveys that are purposely designed for intensity mapping in interferometer mode}. Here we investigate the constraints attainable from surveys operating in single-dish mode, \rev{using the combined power spectrum and bispectrum signal}. In the case of the power spectrum, single-dish surveys typically outperform interferometer surveys. We find that the reverse holds for the bispectrum: single-dish surveys are not competitive with surveys designed for interferometer mode.
31 pages, 5 figures, Power spectrum constraints added; version accepted by Phys. Dark Univ
References in corpus (25)
- Cosmology at Low Frequencies: The 21 cm Transition and the High-Redshift Universe
- The imprints of primordial non-gaussianities on large-scale structure: scale dependent bias and abundance of virialized objects
- Clustering of dark matter tracers: generalizing bias for the coming era of precision LSS
- Baryon Acoustic Oscillation Intensity Mapping as a Test of Dark Energy
- Late-time cosmology with 21cm intensity mapping experiments
- Effects of Scale-Dependent Non-Gaussianity on Cosmological Structures
- Cosmology and the Bispectrum
- The bispectrum of galaxies from high-redshift galaxy surveys: primordial non-Gaussianity and non-linear galaxy bias
- Primordial non-gaussianity, statistics of collapsed objects, and the Integrated Sachs-Wolfe effect
- A Method for 21cm Power Spectrum Estimation in the Presence of Foregrounds
- HIRAX: A Probe of Dark Energy and Radio Transients
- ELUCID - Exploring the Local Universe with reConstructed Initial Density field I: Hamiltonian Markov Chain Monte Carlo Method with Particle Mesh Dynamics
- Blind foreground subtraction for intensity mapping experiments
- The Fast Fourier Transform Telescope
- ELUCID - Exploring the Local Universe with reConstructed Initial Density field III: Constrained Simulation in the SDSS Volume
- Forecasts on the Dark Energy and Primordial Non-Gaussianity Observations with the Tianlai Cylinder Array
- Modeling the neutral hydrogen distribution in the post-reionization Universe: intensity mapping
- The Clustering Characteristics of HI-Selected Galaxies from the 40% ALFALFA Survey
- The Impact of Foregrounds on Redshift Space Distortion Measurements With the Highly-Redshifted 21 cm Line
- Primordial non-Gaussianity in the large scale structure of the Universe
- Cosmological parameter forecasts for HI intensity mapping experiments using the angular power spectrum
- Quantifying the Redshift Space Distortion of the Bispectrum I: Primordial Non-Gaussianity
- Probing the primordial Universe with MeerKAT and DES
- Impact of Uncertainties in the Cosmological Parameters on the Measurement of Primordial non-Gaussianity
- Large Scale Structure Reconstruction with Short-Wavelength Modes
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- Testing one-loop galaxy bias: joint analysis of power spectrum and bispectrum
- The foreground transfer function for HI intensity mapping signal reconstruction: MeerKLASS and precision cosmology applications
- Responses of Halo Occupation Distributions: a new ingredient in the halo model & the impact on galaxy bias
- Cosmological constraints from the power spectrum and bispectrum of 21cm intensity maps
- Light Fields during Inflation from BOSS and Future Galaxy Surveys
- Multi-tracer power spectra and bispectra: Formalism
- The local PNG bias of neutral Hydrogen,
- Improving constraints on primordial non-Gaussianity using neural network based reconstruction
- Extracting the Signal of Cosmic String Wakes from 21-cm Observations
- HI intensity mapping with MeerKAT: forecast for delay power spectrum measurement using interferometer mode
- Unveiling the Universe with Emerging Cosmological Probes
- Decoupling Local Primordial non-Gaussianity from Relativistic Effects in the Galaxy Bispectrum
- Cosmological constraints from the EFT power spectrum and tree-level bispectrum of 21cm intensity maps
- Constraining primordial non-Gaussianity by combining photometric galaxy and 21cm intensity mapping surveys
- Squeezing information from radio surveys to probe the primordial Universe
- Fundamental Physics in 2025: Status, Decisive Targets, and Path Forward
- Multi-wavelength spectroscopic probes: prospects for primordial non-Gaussianity and relativistic effects
- Probing the large-scale structure with 21cm-galaxy cross-bispectrum: Estimates from simulations and forecasts for upcoming cosmological surveys