Constraining cosmology with a new all-sky Compton parameter map from the Planck PR4 data

Abstract

We constructed a new all-sky Compton parameter map (𝑦-map) of the thermal Sunyaev-Zel'dovich (tSZ) effect from the 100 to 857 GHz frequency channel maps delivered within the Planck data release 4. The improvements in terms of noise and systematic effects translated into a 𝑦-map with a noise level smaller by ∼7% compared to the maps released in 2015, and with significantly reduced survey stripes. The produced 2020 𝑦-map is also characterized by residual foreground contamination, mainly due to thermal dust emission at large angular scales and to CIB and extragalactic point sources at small angular scales. Using the new Planck data, we computed the tSZ angular power spectrum and found that the tSZ signal dominates the 𝑦-map in the multipole range, 60 < ℓ < 600. We performed the cosmological analysis with the tSZ angular power spectrum and found 𝑆 8 = 0.764 +0.015 −0.018 (𝑠𝑡𝑎𝑡) +0.031 −0.016 (𝑠𝑦𝑠), including systematic uncertainties from a hydrostatic mass bias and pressure profile model. The 𝑆 8 value may differ by ±0.016 depending on the hydrostatic mass bias model and by +0.021 depending on the pressure profile model used for the analysis. The obtained value is fully consistent with recent KiDS and DES weak-lensing observations. While our result is slightly lower than the Planck CMB one, it is consistent with the latter within 2𝜎.

Shocks in the Stacked Sunyaev-Zel'dovich Profiles of Clusters II: Measurements from SPT-SZ + Planck Compton-y Map

“…Accurate measurements of gas profiles at the cluster outskirts -particularly near and beyond the one-to-two-halo transition regime -improve the modelling needed in studies of the tSZ autocorrelation and cross-correlations with galaxy, galaxy cluster, or weak lensing catalogs (e.g., Hill & Pajer 2013;Hajian et al 2013;Ma et al 2015;Vikram et al 2017;Hojjati et al 2017;Horowitz & Seljak 2017;Osato et al 2018;Hill et al 2018;Pandey et al 2019;Osato et al 2020;Pandey et al 2020;Shirasaki et al 2020;Pandey et al 2021;Gatti et al 2021;Tanimura et al 2021); such studies can provide strong constraints on both cosmological and astrophysical parameters.…”

Shocks in the stacked Sunyaev-Zel’dovich profiles of clusters II: Measurements from SPT-SZ + Planck Compton-y map

“…Accurate measurements of gas profiles at the cluster outskirts -particularly near and beyond the one-to-two-halo transition regime -improve the modelling needed in studies of the tSZ auto-correlation (e.g., Hill & Pajer 2013;Horowitz & Seljak 2017;Tanimura et al 2021) as well as tSZ cross-correlations with galaxy and galaxy cluster positions (e.g., Hajian et al 2013;Vikram et al 2017;Hill et al 2018;Pandey et al 2019Pandey et al , 2020, with weak lensing shears (e.g., Ma et al 2015;Hojjati et al 2017;Osato et al 2018Osato et al , 2020Shirasaki et al 2020;Gatti et al 2021;Pandey et al 2021), or with X-ray luminosity (Shirasaki et al 2020); such studies can provide strong and complementary constraints on both cosmological and astrophysical parameters.…”