Speaker
Description
The eROSITA (extended ROentgen Survey with an Imaging Telescope Array) instrument aboard the Spektrum-Roentgen-Gamma (SRG) mission has significantly expanded the horizon of X-ray astronomy, delivering unprecedented legacy samples through its high sensitivity, wide field of view, and survey efficiency. These capabilities have enabled major advances in our understanding of growing supermassive black holes, active galactic nuclei (AGN), and rare nuclear transients.
eROSITA has also transformed studies of large-scale structure by providing the largest X-ray-selected sample of galaxy clusters and groups. By combining eROSITA data with optical surveys such as DESI Legacy Imaging Surveys, DES, HSC-SSP, and KiDS, the evolution of the cluster mass function now provides percent-level cosmological constraints, while also enabling the detection of diffuse baryons in cluster outskirts and cosmic filaments.
I will present an overview of some of the most significant results and discoveries from the western half of the sky, for which the German eROSITA consortium is responsible.