XLSSC 122 caught in the act of growing up: Spatially resolved SZ observations of a z=1.98 galaxy cluster

Understand

How protoclusters evolved from sparse galaxy overdensities to mature galaxy clusters is still not well understood.

• In this context, detecting and characterizing the hot ICM at high redshifts (z~2) is key to understanding how the continuous accretion from and mergers along the filamentary large-scale structure impact the first phases of cluster formation.
• We study the dynamical state and morphology of the z=1.98 galaxy cluster XLSSC 122 with high-resolution observations (~5") of the ICM through the SZ effect.
• Via Bayesian forward modeling, we map the ICM on scales from the virial radius down to the core of the cluster.