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DGCE SIG Seminar

Diffuse Gas in Cosmic Ecosystems Science Interest Group

DGCE SIG about DGCE SIG Seminar

Location

Virtual

Dates

22 January 2026

Community

DGCE SIG

Type

Seminar

Mapping Hot Gas Kinematics in Galaxy Clusters with XRISM: What Have We Learned So Far?

Speaker

Irina Zhuravleva, University of Chicago

Abstract

The XRISM observatory (JAXA/NASA), launched in September 2023, is now providing the long-awaited high-resolution X-ray spectra of extended sources such as galaxy clusters, enabling direct measurements of hot gas motions. These observations add a dynamical dimension to studies of the intracluster medium and offer unprecedented insight into energy transport driven by supermassive black hole feedback and cluster mergers.I will review the first XRISM results from observations of bright, nearby galaxy clusters, focusing on what they reveal about feedback processes, turbulence properties, the physics of cluster mergers, and the level of non-thermal pressure support in the cluster outskirts, which is important for cluster cosmology.

Seminar Connection

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Meeting ID: 971 1027 5736

Passcode: 326183

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Angled from the upper left corner to the lower right corner is a cone-shaped orange-red cloud known as Herbig-Haro 49/50. This feature takes up about three-fourths of the length of this angle. The upper left end of this feature has a translucent, rounded end. The conical feature widens slightly from the rounded end at the upper right down to the lower right. Along the cone there are additional rounded edges, like edges of a wave, and intricate foamy-like details, as well as a clearer view of the black background of space. In the upper left, overlapping with the rounded end of Herbig-Haro 49/50, is a background spiral galaxy with a concentrated blue center that fades outward to blend with red spiral arms. The background of space is speckled with some white stars and smaller, more numerous, fainter white galaxies throughout.