Probing Cosmology and Cluster Structure with the Sunyaev–Zel’dovich Decrement vs. X–ray Temperature Scaling Relation

          @misc{ scivideos_PIRSA:09040033,
            doi = {10.48660/09040033},
            url = {https://pirsa.org/09040033},
            author = {Shang, Cien},
            keywords = {Cosmology},
            language = {en},
            title = {Probing Cosmology and Cluster Structure with the Sunyaev{\textendash}Zel{\textquoteright}dovich Decrement vs. X{\textendash}ray Temperature Scaling Relation},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2009},
            month = {apr},
            note = {PIRSA:09040033 see, \url{https://scivideos.org/pirsa/09040033}}
          }
          

Abstract

Scaling relations among galaxy cluster observables, which will become available in large future samples of galaxy clusters, could be used to constrain not only cluster structure,but also cosmology. I will discuss the utility of this approach, employing a physically motivated parametric model to describe cluster structure, and applying it to the expected relation between the Sunyaev-Zel’dovich decrement (S_{\nu}) and the emission–weighted X–ray temperature (Tew). With a suitable choice of fiducial parameter values, the cluster model satisfies several existing observational constraints. A Fisher matrix is employed to estimate the joint errors on cosmological and cluster structure parameters from a measurement of S_{\nu} vs. Tew in a future survey. I will also compare the cosmology constraints from the scaling relation to those expected from the number counts (dN/dz) of the same clusters.