Halo Pressure Profile through the Skew Cross-Power Spectrum of Sunyaev-Zel'dovich Effect and CMB Lensing in $\textit{Planck}$

TL;DR

This paper uses Planck data to measure the skewness power spectrum, revealing the cross-correlation between CMB lensing and the thermal SZ effect, and constrains the gas pressure profile of dark matter halos.

Contribution

It introduces a novel measurement of the skewness power spectrum to analyze the gas pressure profile in dark matter halos using Planck data.

Findings

Measured the CMB skewness power spectrum with Planck data.

Constrained the gas pressure profile of dark matter halos.

Compared pressure profile results with existing literature.

Abstract

We measure the Cosmic Microwave Background (CMB) skewness power spectrum in $\textit{Planck}$, using frequency maps of the HFI instrument and the Sunyaev-Zel'dovich (SZ) component map. The two-to-one skewness power spectrum measures the cross-correlation between CMB lensing and the thermal SZ effect. We also directly measure the same cross-correlation using $\textit{Planck}$ CMB lensing map and the SZ map and compare it to the cross-correlation derived from the skewness power spectrum. We model fit the SZ power spectrum and CMB lensing-SZ cross power spectrum via the skewness power spectrum to constrain the gas pressure profile of dark matter halos. The gas pressure profile is compared to existing measurements in the literature including a direct estimate based on the stacking of SZ clusters in $\textit{Planck}$.