"Unveiling Complex Kinematics of Hot Gas in Galaxy Clusters with XRISM"

The recent launch of the XRISM observatory has opened a new era of high-energy astrophysics. Resolve, the primary instrument on XRISM, provides high-resolution (~5 eV) X-ray spectra of various X-ray sources, including extended sources like galaxy clusters. This capability enables direct kinematic mapping of hot gas in many galaxy clusters for the first time. In this talk, I will highlight some of the results from observations of galaxy clusters taken during the first year of the mission. In particular, I will discuss a “double-cascade” of velocities found in the core of the Perseus cluster, stormy weather of the Coma cluster and unusual properties of the velocity power spectrum, gas kinematic properties in a relaxed cluster A2029 out to cosmologically interesting radii, among other exciting results.