Retrieving cosmological information from small-scale CMB foregrounds II. The kinetic Sunyaev Zel'dovich effect

Abstract

Recent results of ground-based telescopes, giving high-quality measurements of the CMB temperature power spectrum on small scales motivate the need for an accurate model of foregrounds, which dominate the primary signal at these multipoles. In a previous work, we have shown that cosmological information could be retrieved from the power spectrum of the thermal SZ effect. In this work, we introduce a physically motivated model of the Epoch of Reionisation in the cosmological analysis of CMB data, which is coherent on all scales. In particular, at high multipoles, the power spectrum of the kinetic SZ (kSZ) effect is inferred from a set of cosmological and reionisation parameters by a machine-learning algorithm. First including an asymmetric parameterisation of the reionisation history in the Planck 2018 data analysis, we retrieve a value of the optical depth consistent with previous results, but stemming from a completely different history of reionisation in which the first luminous sources light up as early as $z=15$. Considering the latest small-scale data from the SPT and letting the cosmology free to vary, we find that including the new cosmology-dependent SZ spectra helps tighten the constraints on their amplitudes by breaking their degeneracy. We report a $5\sigma$ measurement of the kSZ signal at $\ell =3000$, ${\mathcal{D}}_{3000}^{\mathrm{kSZ}}=3.4_{-0.3}^{+0.5}\mu {\mathrm{K}}^2$ at the 68% confidence level, marginalised over cosmology, as well as an upper limit on the patchy signal from reionisation ${\mathcal{D}}_{3000}^{\mathrm{pkSZ}}<1.6\mu {\mathrm{K}}^2$ (95% C.L.). Additionally, we find that the SPT data favour slightly earlier reionisation scenarios than Planck, leading to $\tau =0.062_{-0.015}^{+0.012}$ and a reionisation midpoint $z_{\mathrm{re}}=7.9_{-1.3}^{+1.1}$ (68% C.L.), which is in line with constraints from high-redshift quasars and galaxies.

The code used to estimate the kSZ and tSZ power spectra from cosmological parameters can be found at https://szdb.osups.universite-paris-saclay.fr/. This paper is the second of a series of two (the first one is arXiv:2109.03272)

References in corpus (36)

• The NumPy array: a structure for efficient numerical computation
• Cosmic Reionization and Early Star-Forming Galaxies: A Joint Analysis of New Constraints from Planck and Hubble Space Telescope
• Model-independent evidence in favor of an end to reionization by z~6
• The Canadian Cluster Comparison Project: detailed study of systematics and updated weak lensing masses
• Planck intermediate results. LVII. Joint Planck LFI and HFI data processing
• 21CMMC: an MCMC analysis tool enabling astrophysical parameter studies of the cosmic 21 cm signal
• A measurement of secondary cosmic microwave background anisotropies from the 2500-square-degree SPT-SZ survey
• Constraining the neutral fraction of hydrogen in the IGM at redshift 7.5
• COSMOPOWER: emulating cosmological power spectra for accelerated Bayesian inference from next-generation surveys
• The Atacama Cosmology Telescope: Combined kinematic and thermal Sunyaev-Zel'dovich measurements from BOSS CMASS and LOWZ halos
• 21cmFAST v3: A Python-integrated C code forgenerating 3D realizations of the cosmic 21cm signal
• Texas Spectroscopic Search for Ly$\alpha$ Emission at the End of Reionization III. the Ly$\alpha$ Equivalent-width Distribution and Ionized Structures at $z>7$
• Reconstructing Patchy Reionization from the Cosmic Microwave Background
• Precision Epoch of Reionization studies with next-generation CMB experiments
• CMB Polarization can constrain cosmology better than CMB temperature
• Exploring the hydrostatic mass bias in MUSIC clusters: application to the NIKA2 mock sample
• The eROSITA Final Equatorial-Depth Survey (eFEDS): X-ray Observable-to-Mass-and-Redshift Relations of Galaxy Clusters and Groups with Weak-Lensing Mass Calibration from the Hyper Suprime-Cam Subaru Strategic Program Survey
• CMB/kSZ and Compton-$y$ Maps from 2500 square degrees of SPT-SZ and Planck Survey Data
• Mass bias evolution in tSZ cluster cosmology
• Reionization inference from the CMB optical depth and E-mode polarization power spectra
• A scalable random forest regressor for combining neutron-star equation of state measurements: A case study with GW170817 and GW190425
• Mass calibration of distant SPT galaxy clusters through expanded weak lensing follow-up observations with HST, VLT & Gemini-South
• AMBER: A Semi-numerical Abundance Matching Box for the Epoch of Reionization
• Biases on the cosmological parameters and thermal SZ residuals
• Constraining cosmology with a new all-sky Compton parameter map from the Planck PR4 data
• CosmoReionMC: A package for estimating cosmological and astrophysical parameters using CMB, Lyman-α absorption and global 21 cm data
• The 21 cm-kSZ-kSZ Bispectrum during the Epoch of Reionization
• Cosmic Reionization May Still Have Started Early and Ended Late: Confronting Early Onset with CMB Anisotropy and 21 cm Global Signals
• Kinetic Sunyaev-Zel'dovich tomography with line-intensity mapping
• Reconstructing the Thomson Optical Depth due to Patchy Reionization with 21-cm Fluctuation Maps
• Reconstructing large scales at cosmic dawn
• Constraining reionization with the first measurement of the cross-correlation between the CMB optical-depth fluctuations and the Compton y-map
• Prospects for kSZ${}^2$-Galaxy Cross-Correlations during Reionization
• Small scale contributions to CMB: A coherent analysis
• Joint constraints on reionization: a framework for combining the global 21cm signal and the kinetic Sunyaev-Zel'dovich effect
• Retrieving cosmological information from small-scale CMB foregrounds I. The thermal Sunyaev Zel'dovich effect

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