出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Since its original formulation the Sunyaev-Zeldovich (SZ) effect has been recognized as a “powerful
laboratory” for our comprehension of physical processes in cosmic structures and to derive
crucial information on some general properties of the universe. After a discussion of the fundamental
concepts and of some well established applications of the SZ effect towards galaxy
clusters, I will focus on dedicated themes related to the SZ effect and other features in the cosmic
microwave background (CMB) of particular interest in the view of the extremely high angular
resolution observations achievable in the future with the Square Kilometre Array (SKA). SKA
will allow the mapping of the thermal and density structure of clusters of galaxies at radio and
centimetre bands with unprecedented resolution and sensitivity and with an extremely accurate
control of extragalactic radio source contamination. The signatures from SZ effects and free-free
emission at galactic scales and in the intergalacticmediumprobe the structure evolution at various
cosmic times. The detection of these sources and their imaging at the high resolution and sensitivity
achievable with SKA will greatly contribute to the comprehension of crucial cosmological and
astrophysical aspects, as the physical conditions of early ionized halos, quasars and proto-galactic
gas. The spectacular improvement in our understanding of the properties of extragalactic radio
sources at very faint fluxes achievable with SKA will allow to accurately model their contribution
to the diffuse radio background, greatly contributing to the interpretation of next generation of
CMB spectrum experiments devoted to probe the thermal plasma history at early times.
