Amplitudes of thermal and kinetic Sunyaev-Zel'dovich signals from small-scale CMB anisotropies

TL;DR

This paper analyzes small-scale CMB anisotropies to measure the amplitudes of thermal and kinetic Sunyaev-Zel'dovich effects by combining data from Herschel, Planck, WMAP, ACT, and SPT, accounting for dusty galaxy contributions.

Contribution

It introduces a method to constrain SZ effect amplitudes by scaling CIB measurements and jointly analyzing multiple CMB datasets, considering galaxy clustering uncertainties.

Findings

Constrained thermal SZ power spectrum amplitude at 150 GHz.

Constrained kinetic SZ power spectrum amplitude at 150 GHz.

Quantified the impact of dusty galaxy clustering on SZ measurements.

Abstract

While the arcminute-scale Cosmic Microwave Background (CMB) anisotropies are due to secondary effects, point sources dominate the total anisotropy power spectrum. At high frequencies the point sources are primarily in the form of dusty, star-forming galaxies. Both Herschel and Planck have recently measured the anisotropy power spectrum of cosmic infrared background (CIB) generated by dusty, star-forming galaxies from degree to sub-arcminute angular scales, including the non-linear clustering of these galaxies at multipoles of 3000 to 6000 relevant to CMB secondary anisotropy studies. We scale the CIB angular power spectra to CMB frequencies and interpret the combined WMAP-7 year and arcminute-scale Atacama Cosmology Telescope (ACT) and South Pole Telescope (SPT) CMB power spectra measurements to constrain the Sunyaev-Zel'dovich (SZ) effects. Allowing the CIB clustering amplitude to vary, we constrain the amplitudes of thermal and kinetic SZ power spectra at 150 GHz.