Novel Cosmological Tests from Combining Galaxy Lensing and the Polarized Sunyaev-Zel'dovich Effect
arXiv:2206.07054 · doi:10.1103/PhysRevD.106.083501
Abstract
The polarized Sunyaev-Zel'dovich (pSZ) effect is sourced by the Thomson scattering of CMB photons from distant free electrons and yields a novel view of the CMB quadrupole throughout the observable Universe. Galaxy shear measures the shape distortions of galaxies, probing both their local environment and the intervening matter distribution. Both observables give interesting constraints on the cosmological model; here we ask: what can be learnt from their combination? The pSZ-shear cross-spectrum measures the shear-galaxy-polarization bispectrum and contains contributions from (1) the Sachs-Wolfe (SW) effect, (2) the integrated Sachs-Wolfe (ISW) effect, and (3) inflationary gravitational waves. Since the modes contributing to the pSZ signal are not restricted to the Earth's past lightcone, the low-redshift cross-spectra could provide a novel constraint on dark energy via the ISW effect, whilst the SW signal couples scalar modes at very different times but at similar positions; this provides a unique probe of the Universe's homogeneous time evolution. We give expressions for all major contributions to the shear, galaxy, and pSZ auto- and cross-spectra, and evaluate their detectability via Fisher forecasts. Despite significant theoretical utility, the cross-spectra will be challenging to detect: combining CMB-S4 with Rubin yields a detection of the ISW contribution, which increases to for a futuristic experiment involving CMB-HD and a higher galaxy sample density. For parity-even (parity-odd) tensors, we predict a limit of () for CMB-S4 and Rubin, or () for the more futuristic setup. Whilst this is significantly better than the constraints from galaxy shear alone (and less sensitive to systematics), it is unlikely to be competitive, but may serve as a useful cross-check.
arXiv comment15+5 pages, accepted by Phys. Rev. D. Code available at https://github.com/oliverphilcox/pSZ-cross-Shear
References in corpus (44)
- Weak Gravitational Lensing
- The Simons Observatory: Science goals and forecasts
- Dark Energy Survey Year 3 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
- Karhunen-Loeve eigenvalue problems in cosmology: how should we tackle large data sets?
- Intrinsic alignment-lensing interference as a contaminant of cosmic shear
- Cosmological constraints from cosmic shear two-point correlation functions with HSC survey first-year data
- Planck 2013 results. XIX. The integrated Sachs-Wolfe effect
- Weak lensing analysis in three dimensions
- Superhorizon Perturbations and the Cosmic Microwave Background
- Testing the tidal alignment model of galaxy intrinsic alignment
- Weak Gravitational Flexion
- Cosmic Rulers
- Is the Universe homogeneous?
- Getting Around Cosmic Variance
- Microwave polarization in the direction of galaxy clusters induced by the CMB quadrupole anisotropy
- Large-Scale Structure with Gravitational Waves II: Shear
- Large-Scale Structure and Gravitational Waves III: Tidal Effects
- Cosmology with kSZ: breaking the optical depth degeneracy with Fast Radio Bursts
- The effect of Limber and flat-sky approximations on galaxy weak lensing
- Reconstruction of the remote dipole and quadrupole fields from the kinetic Sunyaev Zel'dovich and polarized Sunyaev Zel'dovich effects
- Measuring the Integrated Sachs-Wolfe Effect
- A Detection of the Integrated Sachs-Wolfe Effect
- Primordial Gravitational Waves from Galaxy Intrinsic Alignments
- The kinetic SZ tomography with spectroscopic redshift surveys
- Thermal and kinematic corrections to the microwave background polarization induced by galaxy clusters along the line of sight
- Analysis of the Kamionkowski-Loeb method of reducing cosmic variance with CMB polarization
- Probing the Universe on Gigaparsec Scales with Remote Cosmic Microwave Background Quadrupole Measurements
- Detecting the polarization induced by scattering of the microwave background quadrupole in galaxy clusters
- Polarized Sunyaev Zel'dovich tomography
- Relativistic Corrections to the Sunyaev-Zel'dovich Effect for Clusters of Galaxies. V. Multiple Scattering
- Relativistic Corrections to the Sunyaev-Zel'dovich Effect for Clusters of Galaxies. III. Polarization Effect
- Cosmic Shear from Scalar-Induced Gravitational Waves
- Analyzing the cosmic variance limit of remote dipole measurements of the cosmic microwave background using the large-scale kinetic Sunyaev Zel'dovich effect
- The kinematic Sunyaev Zeldovich effect and transverse cluster velocities
- Forecasted constraints on modified gravity from Sunyaev Zel'dovich tomography
- How to detect gravitational waves through the cross-correlation of the galaxy distribution with the CMB polarization
- CMB-induced Cluster Polarization as a Cosmological Probe
- Towards detection of relativistic effects in galaxy number counts using kSZ Tomography
- Probing the largest scale structure in the universe with polarization map of galaxy clusters
- Polarization Signal of Distant Clusters and Reconstruction of Primordial Potential Fluctuations
- Primordial gravitational wave phenomenology with polarized Sunyaev Zel'dovich tomography
- Real space tomography of the primordial Universe with cluster polarization
- Reconstruction of CMB Temperature Anisotropies with Primordial CMB Induced Polarization in Galaxy Clusters
- Polarization of the Sunyaev-Zel'dovich effect: relativistic imprint of thermal and non-thermal plasma