Full-sky bispectrum in redshift space for 21cm intensity maps
arXiv:2008.02266 · doi:10.1088/1475-7516/2020/12/003
Abstract
We compute the tree-level bispectrum of 21cm intensity mapping after reionisation. We work in the directly observable angular and redshift space, focusing on equal-redshift correlations and thin redshift bins, for which the lensing contribution is negligible. We demonstrate the importance of the contributions from redshift-space distortions which typically dominate the result. Taking into account the effects of telescope beams and foreground cleaning, we estimate the signal to noise and show that the bispectrum is detectable by both SKA in single-dish mode and HIRAX in interferometer mode, especially at the lower redshifts in their respective ranges.
Version accepted by JCAP
References in corpus (42)
- Large-Scale Structure of the Universe and Cosmological Perturbation Theory
- Acoustic Signatures in the Primary Microwave Background Bispectrum
- Large-Scale Galaxy Bias
- The linear power spectrum of observed source number counts
- What galaxy surveys really measure
- Baryon Acoustic Oscillation Intensity Mapping as a Test of Dark Energy
- Late-time cosmology with 21cm intensity mapping experiments
- Cosmology with Phase 1 of the Square Kilometre Array; Red Book 2018: Technical specifications and performance forecasts
- General Relativistic Description of the Observed Galaxy Power Spectrum: Do We Understand What We Measure?
- Ingredients for 21cm intensity mapping
- HIRAX: A Probe of Dark Energy and Radio Transients
- Testing General Relativity with 21 cm intensity mapping
- Ultra large-scale cosmology in next-generation experiments with single tracers
- Cosmological information in the redshift-space bispectrum
- Beyond the Linear-Order Relativistic Effect in Galaxy Clustering: Second-Order Gauge-Invariant Formalism
- Hunting down horizon-scale effects with multi-wavelength surveys
- Galaxy number counts to second order and their bispectrum
- Observed galaxy number counts on the lightcone up to second order: I. Main result
- Cosmological Parameter Estimation with Large Scale Structure Observations
- Cosmology with intensity mapping techniques using atomic and molecular lines
- The bispectrum of relativistic galaxy number counts
- Reconstructing large-scale structure with neutral hydrogen surveys
- Forecasts on Primordial non-Gaussianity from 21 cm Intensity Mapping experiments
- Non-Gaussianities due to Relativistic Corrections to the Observed Galaxy Bispectrum
- Calibrating photometric redshifts with intensity mapping observations
- A Consistency Relation for the Observed Galaxy Bispectrum and the Local non-Gaussianity from Relativistic Corrections
- Simulated multi-tracer analyses with HI intensity mapping
- A general relativistic signature in the galaxy bispectrum: the local effects of observing on the lightcone
- The dipole of the galaxy bispectrum
- The Full-Sky Angular Bispectrum in Redshift Space
- Detecting the relativistic galaxy bispectrum
- Recovering lost 21 cm radial modes via cosmic tidal reconstruction
- Higher order relativistic galaxy number counts: dominating terms
- Imprints of local lightcone projection effects on the galaxy bispectrum. II
- Imprints of local lightcone projection effects on the galaxy bispectrum. III Relativistic corrections from nonlinear dynamical evolution on large-scales
- Nonlinear modulation of the HI power spectrum on ultra-large scales. I
- Constraints on the growth rate using the observed galaxy power spectrum
- Multipoles of the relativistic galaxy bispectrum
- A new estimator for gravitational lensing using galaxy and intensity mapping surveys
- Intensity mapping of the 21cm emission: lensing
- Imprints of local lightcone projection effects on the galaxy bispectrum IV: Second-order vector and tensor contributions
- The gravitational and lensing-ISW bispectrum of 21cm radiation
Cited by in corpus (13)
- Detecting the relativistic bispectrum in 21cm intensity maps
- Wide-angle and relativistic effects in Fourier-space clustering statistics
- Local primordial non-Gaussianity in the relativistic galaxy bispectrum
- The HI intensity mapping bispectrum including observational effects
- The BINGO Project V: Further steps in Component Separation and Bispectrum Analysis
- A fast estimator for quantifying the shape dependence of the 3D bispectrum
- Constraining the neutrino mass using a multi-tracer combination of two galaxy surveys and CMB lensing
- A wide-angle formulation of foreground filters for HI intensity mapping
- An Estimator for the lensing potential from galaxy number counts
- Speeding up the detectability of the harmonic-space galaxy bispectrum
- Testing General Relativity with Cosmological Large Scale Structure
- Lensing contribution to the 21cm intensity bispectrum
- Probing the large-scale structure with 21cm-galaxy cross-bispectrum: Estimates from simulations and forecasts for upcoming cosmological surveys