XRay observations normalized ICM models: SZ scaling relations and cosmological implications

          @misc{ pirsa_09040036,
            doi = {10.48660/09040036},
            url = {https://pirsa.org/09040036},
            author = {Majumdar, Subha},
            keywords = {Cosmology},
            language = {en},
            title = {XRay observations normalized ICM models: SZ scaling relations and cosmological implications},
            publisher = {Perimeter Institute},
            year = {2009},
            month = {apr},
            note = {PIRSA:09040036 see, \url{https://pirsa.org}}
          }
          

Abstract

We build simple, 'top-down', models for the gas density and temperature profiles for clusters of galaxies based on current high precision XRay observations so as to 'exactly' satisfy observed XRay scaling relation between temperature and mass. The gas is assumed to be in hydrostatic equilibrium along with a component of non-thermal pressure due to dispersion and the gas fraction reaches universal value only at or beyond the virial radius. For these models, we calculate the Sunyaev-Zel'dovich Effect (SZE) scaling relations. We show that all the predicted SZE scaling relations between the integrated SZE flux and the gas temperature, the gas mass, the total mass, as well as, the gas fraction are in excellent agreement with recent SZE observations by Bonamente etal (2008). The consistency between the global properties of clusters detected in X-Ray's and in SZE hints that we are looking at the same population of clusters as a whole. Implications for SZE power spectrum, SZE flux-M200 scaling relation and number counts are discussed