Observations of the SZ effect in the Athena Era

The three main forms of the Sunyaev-Zeldovich effect – the classical thermal SZ effect, the kinetic SZ effect, and relativistic corrections to the thermal SZ effect – are already beginning to provide powerful tools to probe the warm/hot intracluster, intragroup, intercluster, and circumgalactic media traditionally probed through in X-ray observations. The current state of the art is dominated by widefield, arcminute resolution surveys such as those with Planck, ACT, and SPT, or by higher resolution targeted observations of very small fields such as those by MUSTANG-2, ALMA, and NIKA2. However, in the 2030s we anticipate the Atacama Large Aperture Submm Telescope (AtLAST) will lead a new generation of high spatial and spectral resolution widefield SZ observations. In this talk I will discuss the developing SZ science cases for AtLAST and how AtLAST can complement Athena.