Pressure profiles of distant Galaxy clusters with Planck-SPT data

TL;DR

This paper introduces numerical tools for extracting galaxy cluster pressure profiles from combined Planck and SPT data, enabling detailed analysis of cluster thermodynamics and evolution across cosmic time.

Contribution

It presents a novel pipeline for joint analysis of Planck and SPT observations to accurately derive pressure profiles of galaxy clusters, validated against X-ray data.

Findings

Pipeline successfully separates cluster signals from background and foreground.

Joint analysis constrains cluster structure at multiple scales.

Validation shows consistency with X-ray derived profiles.

Abstract

We present a full set of numerical tools to extract Galaxy Cluster pressure profiles from the joint analysis of Planck and South Pole Telescope (SPT) observations. Pressure profiles are powerful tracers of the thermodynamic properties and the internal structure of the clusters. Tracing the pressure over the cosmic times allows to constraints the evolution of the cluster structure and the contribution of astrophysical phenomena. SPT and Planck are complementary to constrain the cluster structure at various spatial scales. The SPT cluster catalogue counts 677 cluster candidates up to redshift 1.7, it is a nearly mass limited sample, an ideal benchmark to test cluster evolution. We developed a pipeline to first separate the cluster signal from the background and foreground components and then jointly fit a parametric profile model on a combination of Planck and SPT data. We validate our algorithm on a sub-sample of six clusters, common to the SPT and the CHEX-MATE catalogues, comparing the results with the profiles obtained from X-ray observations with XMM-Newton.