Abstract

Contributed Talk - Splinter GalaxyClusters

Wednesday, 09 September 2026, 15:30   (MW-1050)

X-ray Scaling Relations of Galaxy Groups and Clusters in the First eROSITA All-Sky Survey

Miriam Ramos-Ceja, Luca Fiorino, Esra Bulbul, Vittorio Ghirarardini et al.
Max Planck Institute for Extraterrestrial Physics

Scaling relations between the intrinsic properties of galaxy clusters and groups provide valuable insight into their formation and evolution. In this work, we investigate the scaling relations among key physical properties of galaxy groups and clusters detected in the first eROSITA All-Sky Survey. Specifically, we study relations involving the soft-band X-ray luminosity, temperature, gas mass, and the mass proxy . This sample represents the largest dataset used to date for scaling-relation studies of galaxy groups and clusters. We derive the best-fit normalization, slope, redshift evolution, and intrinsic scatter for the Lx-T, Lx-Mgas, Lx-Yx, as well as the Mgas-T relations. Our results indicate that the slopes of the scaling relations deviate significantly from self-similar model, while the redshift evolution remains consistent with the self-similar expectations.