Cosmological constraints from the thermal Sunyaev Zeldovich power spectrum? (1806.04786v1)

Abstract: The latest Planck results on the power spectrum of the Compton-$y$ parameter are the most accurate probe of the thermal Sunyaev Zeldovich (tSZ) effect caused by resolved and un-resolved clusters of galaxies. On large angular scales, the power spectrum amplitude is mostly due to the statistical distribution of clusters in the sky and therefore is an indirect probe of the clustering of matter, $\sigma_8$, as well as the angular diameter distance that depends on other cosmological parameters such as the Hubble parameter, $h$, and the matter density $\Omega_m$. Here I discuss the constraining power of the tSZ power spectrum, in light of the Planck Compton-$y$ map data, and our current understanding and measurements of the intra-cluster medium.