Mapping the gas thermodynamic properties of the massive cluster merger MOO J1142$+$1527 at z = 1.2

TL;DR

This study combines high-resolution SZ and X-ray data to map the thermodynamic properties of the massive, merging galaxy cluster MOO J1142+1527 at redshift 1.2, revealing detailed temperature and entropy profiles.

Contribution

It provides the first detailed thermodynamic mapping of a high-redshift cluster using combined SZ and X-ray observations, highlighting merger dynamics and cool-core presence.

Findings

MOO J1142+1527 is an ongoing merger with a cool-core.

The temperature profile at z=1.2 is mapped with unprecedented precision.

Spatially-resolved SZ data enhances understanding of intracluster medium properties.

Abstract

We present the results of the analysis of the very massive cluster MOO J1142$+$1527 at a redshift $z = 1.2$ based on high angular resolution NIKA2 Sunyaev-Zel'dovich (SZ) and $Chandra$ X-ray data. This multi-wavelength analysis enables us to estimate the shape of the temperature profile with unprecedented precision at this redshift and to obtain a map of the gas entropy distribution averaged along the line of sight. The comparison between the cluster morphological properties observed in the NIKA2 and $Chandra$ maps together with the analysis of the entropy map allows us to conclude that MOO J1142$+$1527 is an on-going merger hosting a cool-core at the position of the X-ray peak. This work demonstrates how the addition of spatially-resolved SZ observations to low signal-to-noise X-ray data can bring valuable insights on the intracluster medium thermodynamic properties at $z>1$.