Extracting the late-time kinetic Sunyaev-Zel'dovich effect

Abstract

We propose a novel technique to separate the late-time, post-reionization component of the kinetic Sunyaev-Zeldovich (kSZ) effect from the contribution to it from a (poorly understood and probably patchy) reionization history. The kSZ effect is one of the most promising probe of the {\em missing baryons} in the Universe. We study the possibility of reconstructing it in three dimensions (3D), using future spectroscopic surveys such as the Euclid survey. By reconstructing a 3D template from galaxy density and peculiar velocity fields from spectroscopic surveys we cross-correlate the estimator against CMB maps. The resulting cross-correlation can help us to map out the kSZ contribution to CMB in 3D as a function of redshift thereby extending previous results which use tomographic reconstruction. This allows the separation of the late time effect from the contribution owing to reionization. By construction, it avoids contamination from foregrounds, primary CMB, tSZ effect as well as from star forming galaxies. Due to a high number density of galaxies the signal-to-noise (S/N) for such cross-correlational studies are higher, compared to the studies involving CMB power spectrum analysis. Using a spherical Bessel-Fourier (sFB) transform we introduce a pair of 3D power-spectra: ${\mathcal{C}}_{\ell }^{\parallel }(k)$ and ${\mathcal{C}}_{\ell }^{\perp }(k)$ that can be used for this purpose. We find that in a future spectroscopic survey with near all-sky coverage and a survey depth of $z\approx 1$, reconstruction of ${\mathcal{C}}_{\ell }^{\perp }(k)$ can be achieved in a few radial wave bands $k\approx (0.01-0.5h^{-1}\mathrm{Mpc})$ with a S/N of upto $\mathcal{O}(10)$ for angular harmonics in the range $\ell =(200-2000)$ (abrdiged).

19 pages, 6 figures

References in corpus (19)

• A luminous quasar at a redshift of z = 7.085
• Extended Limber Approximation
• Baryon Acoustic Oscillation Intensity Mapping as a Test of Dark Energy
• The Search for the Missing Baryons at Low Redshift
• A measurement of secondary cosmic microwave background anisotropies from the 2500-square-degree SPT-SZ survey
• Power spectrum extraction for redshifted 21-cm epoch of reionization experiments: the LOFAR case
• Measuring dark energy properties with 3D cosmic shear
• Planck intermediate results. XXXVII. Evidence of unbound gas from the kinetic Sunyaev-Zeldovich effect
• Nonlinear Bias of Cosmological Halo Formation in the Early Universe
• Finding the Missing Baryons Using CMB as a Backlight
• The thermal Sunyaev-Zel'dovich Signature of Baryons in the Local Universe
• One Thousand and One Clusters: Measuring the Bulk Flow with the Planck ESZ and X-Ray Selected Galaxy Cluster Catalogs
• 3D Weak Gravitational Lensing of the CMB and Galaxies
• Kinematic Sunyaev-Zeldovich Cosmic Microwave Background Temperature Anisotropies Generated by Gas in Cosmic Structures
• The Impact of Nonlinear Structure Formation on the Power Spectrum of Transverse Momentum Fluctuations and the Kinetic Sunyaev-Zel'dovich Effect
• Galaxy correlations and the BAO in a void universe: structure formation as a test of the Copernican Principle
• Galaxy Clustering in 3D and Modified Gravity Theories
• The contribution of the kinematic Sunyaev-Zel'dovich Effect from the Warm Hot Intergalactic Medium to the Five-Year WMAP Data
• Reconstructing the Thermal Sunyaev-Zel'dovich Effect in 3D

Cited by in corpus (16)

• Constraining local non-Gaussianities with kSZ tomography
• Looking at cosmic near-infrared background radiation anisotropies
• Reconstruction of the remote dipole and quadrupole fields from the kinetic Sunyaev Zel'dovich and polarized Sunyaev Zel'dovich effects
• Polarized Sunyaev Zel'dovich tomography
• Analyzing the cosmic variance limit of remote dipole measurements of the cosmic microwave background using the large-scale kinetic Sunyaev Zel'dovich effect
• Towards testing CMB anomalies using the kinetic and polarized Sunyaev Zel'dovich effects
• Detection of pairwise kSZ effect with DESI galaxy clusters and Planck
• Kinetic Sunyaev-Zel'dovich tomography with line-intensity mapping
• Forecasted constraints on modified gravity from Sunyaev Zel'dovich tomography
• The Integrated Bispectrum and Beyond
• Primordial trispectrum from kSZ tomography
• Towards detection of relativistic effects in galaxy number counts using kSZ Tomography
• Uncorrelated Compensated Isocurvature Perturbations from kSZ Tomography
• Subtracting the kinetic Sunyaev-Zeldovich effect from the cosmic microwave background with surveys of large-scale structure
• Remote Dipole Field Reconstruction with Dusty Galaxies
• On Weak Lensing Response Functions