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

Abstract

<jats:p>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<jats:italic>Chandra</jats:italic>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<jats:italic>Chandra</jats:italic>maps together with the analysis of the entropy map allows us to conclude that MOOJ1142+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<jats:italic>z<jats:bold>&gt;</jats:bold></jats:italic>1.</jats:p>