XRISM measurements of intracluster gas kinematics to be reviewed Jan 22

Irina Zhuravleva of the University of Chicago will present a Diffuse Gas in Cosmic Ecosystems Science Interest Group seminar on January 22, 2026, titled "Mapping Hot Gas Kinematics in Galaxy Clusters with XRISM: What Have We Learned So Far?" The talk is scheduled for 4:00 p.m. ET / 1:00 p.m. PT.

The seminar abstract notes that the XRISM observatory (JAXA/NASA), launched in September 2023, is now providing high-resolution X-ray spectra of extended sources such as galaxy clusters, enabling direct measurements of hot gas motions. These observations are described as adding a dynamical dimension to studies of the intracluster medium and offering insight into energy transport driven by supermassive black hole feedback and cluster mergers.

Zhuravleva will review the first XRISM results from observations of bright, nearby galaxy clusters, focusing on feedback processes, turbulence properties, the physics of cluster mergers, and the level of non-thermal pressure support in cluster outskirts, which the abstract says is important for cluster cosmology. Seminar connection: https://science.nasa.gov/astrophysics/programs/cosmic-origins/community/dgce-sig-seminar-22-jan-2026/ Meeting ID (zoom): 971 1027 5736 Passcode: 326183.

Key Topics

Science, Xrism, Galaxy Clusters, Intracluster Medium, Irina Zhuravleva, Black Hole Feedback