Thermodynamics of Galaxy Clusters and Beyond

          @misc{ pirsa_PIRSA:09040037,
            doi = {10.48660/09040037},
            url = {https://pirsa.org/09040037},
            author = {Nagai, Daisuke},
            keywords = {Cosmology},
            language = {en},
            title = {Thermodynamics of Galaxy Clusters and Beyond},
            publisher = {Perimeter Institute},
            year = {2009},
            month = {apr},
            note = {PIRSA:09040037 see, \url{https://pirsa.org}}
          }
          

Abstract

Clusters of galaxies are unique probes of cosmology and astrophysics, promising to provide new insights into both the nature of dark energy and dark matter and the physics of galaxy formation. One of the key challenges facing this approach lies in our understanding of cluster physics and their impact on cluster structure and evolution. In this talk, I will present numerical simulations of galaxy clusters and their comparisons to recent Chandra X-ray observations, with focus on thermodynamics of intracluster plasma. Numerical simulations including gas cooling and star formation reproduce global properties of the intracluster medium (ICM) and observable-mass relations with an accuracy of ~10%. I will further show that non-thermal processes, such as turbulence, cosmic-rays, and ICM plasma physics, will become important for understanding the remaining systematic uncertainty in the cluster mass estimate and cosmological constraints derived using galaxy clusters.