SESZIONE DI TORINO
The SZ effect is a unique tool to study the complex physics of cluster atmospheres because it is sensitive to the specific features of the spectra of the various electronic populations. Multi-frequency (X-ray, optical and radio) observations of galaxy clusters indicate, in fact, that the atmospheres of these cosmic structures consist of a complex structure of thermal (hot and warm) and non-thermal (with different origin and spectra) distribution of electrons (and protons) which is, therefore, far from its modeling as a single, thermal electronic plasma. This evidence requires to go beyond the simple, standard lore of the SZ effect. Such a task is challenging for both the theoretical aspects of their modeling and for the experimental goals to be achieved, but it will return a large amount of physical information by using the SZ effect as a unique tool for astro-particle and cosmology. In such a context, the coming SZ experiments from space (like OLIMPO and SAGACE) will open a new path in the exploration of the SZ effect as a probe for Cosmology and Astro-Particle Physics.

DATA: 29-04-2008