Cosmic tidal reconstruction

Abstract

The gravitational coupling of a long-wavelength tidal field with small-scale density fluctuations leads to anisotropic distortions of the locally measured small-scale matter correlation function. Since the local correlation function is known to be statistically isotropic in the absence of such tidal interactions, the tidal distortions can be used to reconstruct the long-wavelength tidal field and large-scale density field in analogy with the cosmic microwave background lensing reconstruction. In this paper we present the theoretical framework of cosmic tidal reconstruction and test the reconstruction in numerical simulations. We find that the density field on large scales can be reconstructed with good accuracy and the cross-correlation coefficient between the reconstructed density field and the original density field is greater than 0.9 on large scales $(k\lesssim 0.1h/\mathrm{Mpc})$, with the filter scale $\sim 1.25\mathrm{Mpc}/h$. This is useful in the 21cm intensity mapping survey, where the long-wavelength radial modes are lost due to a foreground subtraction process.

12 pages, 8 figures, published version

References in corpus (22)

• Baryon Acoustic Oscillation Intensity Mapping as a Test of Dark Energy
• Measuring primordial non-gaussianity without cosmic variance
• Four Fundamental Foreground Power Spectrum Shapes for 21 cm Cosmology Observations
• How to measure redshift-space distortions without sample variance
• Canadian Hydrogen Intensity Mapping Experiment (CHIME) Pathfinder
• Precision measurement of the local bias of dark matter halos
• Rejuvenating the matter power spectrum: restoring information with a logarithmic density mapping
• High Performance P3M N-body code: CUBEP3M
• The Tianlai project: a 21cm cosmology experiment
• Clustering Fossils from the Early Universe
• Forecasts on the Dark Energy and Primordial Non-Gaussianity Observations with the Tianlai Cylinder Array
• Large-Scale Structure and Gravitational Waves III: Tidal Effects
• Super-Sample Signal
• Primordial gravity wave fossils and their use in testing inflation
• The Cross-Correlation of High-Redshift 21 cm and Galaxy Surveys
• Separate Universe Consistency Relation and Calibration of Halo Bias
• CMB Lensing Reconstruction in Real Space
• Measurement of Neutrino Masses from Relative Velocities
• Reionization and the large-scale 21 cm-cosmic microwave background cross correlation
• Dark Energy from Large-Scale Structure Lensing Information
• Precision of diffuse 21-cm lensing
• Straightening the Density-Displacement Relation with a Logarithmic Transform

Cited by in corpus (27)

• Data Analysis for Precision 21 cm Cosmology
• HIRAX: A Probe of Dark Energy and Radio Transients
• Complete super-sample lensing covariance in the response approach
• Inflation and Early Dark Energy with a Stage II Hydrogen Intensity Mapping Experiment
• Large-scale tidal effect on redshift-space power spectrum in a finite-volume survey
• Galaxy power-spectrum responses and redshift-space super-sample effect
• Nonlinear reconstruction
• Lensing reconstruction from line intensity maps: the impact of gravitational nonlinearity
• Two- and Three-Dimensional Probes of Parity in Primordial Gravity Waves
• Measuring the Tidal Response of Structure Formation: Anisotropic Separate Universe Simulations using TreePM
• Astrophysics & Cosmology from Line Intensity Mapping vs Galaxy Surveys
• Recovering lost 21 cm radial modes via cosmic tidal reconstruction
• Beyond CMB cosmic variance limits on reionization with the polarized SZ effect
• Velocity reconstruction with the cosmic microwave background and galaxy surveys
• Constraints on Primordial non-Gaussianity from Future HI Intensity Mapping Experiments
• Anatomy of Cosmic Tidal Reconstruction
• Density reconstruction from biased tracers and its application to primordial non-Gaussianity
• The Cross-correlation of KSZ Effect and 21 cm Intensity Mapping with Tidal Reconstruction
• Real space lensing reconstruction using cosmic microwave background polarization
• Measuring dark matter-neutrino relative velocity on cosmological scales
• Super-sample tidal modes on the celestial sphere
• Large Scale Structure Reconstruction with Short-Wavelength Modes
• Power spectrum in the presence of large-scale overdensity and tidal fields: breaking azimuthal symmetry
• Cosmic Tidal Reconstruction with Halo Fields
• Leveraging cross-correlations and linear covariance-based filtering for line-intensity map reconstructions at linear scales
• Reconstructing the Long-wavelength Matter Density Fluctuation Modes from the Scalar-Type Clustering Fossils
• Clustering redshifts with the 21cm-galaxy cross-bispectrum