The X-ray view of high-redshift clusters: ICM and AGN contribution
Abstract
X-ray observations still represent a very powerful strategy to investigate the properties of galaxy clusters through their formation history. Current and up-coming X-ray telescopes, from Chandra to eRosita and Athena, are able in fact to track the properties of the most important contributor to the cluster baryonic budget: the intra-cluster medium (ICM). ICM thermo-dynamical properties can be reconstructed from its X-ray emission and theoretical models can be evaluated against the observational evidences. Especially at high-redshift, forthcoming X-ray instruments will allow to investigate clusters at the dawn of their assembly. This will help to unveil the details of metal production and diffusion, of the interplay between cooling and feedback mechanisms and of the interaction of the ICM with member galaxies. Predictions for this can already be anticipated via state-of-the-art numerical hydro-simulations, where a vast variety of physical processes (from star formation and cooling to AGN feedback) is carefully treated. In particular, I will show results on the contribution of AGN sources to the ICM X-ray properties, from synthetic observations of the simulated clusters. This will be an important issue to tackle in future observations, aiming at detecting high-redshift clusters and studying their baryonic features.
- Publication:
-
The X-ray Universe 2014
- Pub Date:
- July 2014
- Bibcode:
- 2014xru..confE.229B