Orateur
Description
In a simple cold dark matter scenario, galaxy clusters are formed by hierarchical gravitational collapse of the dominant dark matter component. To the first order, this process is self-similar and scale-free. However, it is known that the thermodynamic properties of the hot gas deviate from those predicted by simple self-similar models, presumably due to the influence of non-gravitational processes. In this poster, we investigate the deviations from self-similar predictions of the thermodynamic profiles of a sample of 92 galaxy clusters selected through their Planck/SPT Sunyaev-Zeldovich effect (SZE) signal. The sample spans a mass range of $\M500=[0.5, 2.0] \times 10^{14}M_{\odot}$, and lies at redshifts $0.05 < z < 1.13$. We measure the scaling of the thermodynamic properties (density, temperature, entropy, pressure) with mass and redshift, with associated uncertainties, as a function of distance from the cluster centre. The redshift scaling exhibit a clear deviation from self-similar predictions at distances $r \lesssim 0.5 \ \R500$, reaching agreement with self-similar only around $1.0\ \R500$. By describing the gas thermodynamic profiles using universal functional forms, we are able to better constrain the intrinsic scatter in the scaled profiles and compare our results with those reported in the literature.
