Speaker
Description
Galaxy clusters serve as powerful cosmological probes through number count analysis. Beyond that, the gas distribution in cluster outskirts provides a model-independent method for deriving competitive cosmological constraints. By combining HIGHMz—a subsample of 32 of the most massive CHEX-MATE clusters—with X-COP clusters, this study derives robust and precise constraints on the matter density and Hubble parameter using four independent methods: gas mass fraction, the ratio of SZ to X-ray pressure, the size-temperature relation, and the universality of the emission measure profile. Crucially, this analysis is designed to be resilient to traditional assumptions and systematics related to baryons, eliminating the need for simulation-based calibrations. The findings will offer valuable insights for the cluster community over the next decade, enhancing our understanding of matter distribution in galaxy groups and clusters and their broader cosmological implications.
| Would you be interested in presenting a poster if the conference is oversubcribed? | No |
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