The redshift evolution of massive galaxy clusters in the MACSIS simulations

Understand

We present the MAssive ClusterS and Intercluster Structures (MACSIS) project, a suite of 390 clusters simulated with baryonic physics that yields realistic massive galaxy clusters capable of matching a wide range of observed properties.

• MACSIS extends the recent BAHAMAS simulation to higher masses, enabling robust predictions for the redshift evolution of cluster properties and an assessment of the effect of selecting only the hottest systems.
• We study the observable-mass scaling relations and the X-ray luminosity-temperature relation over the complete observed cluster mass range.
• As expected, we find the slope of these scaling relations and the evolution of their normalization with redshift departs significantly from the self-similar predictions.