Lifting Astrophysical Uncertainties - How Weak Lensing Solved the Mass Calibration Problem of Clusters

Explore how weak gravitational lensing has revolutionized the mass calibration of galaxy clusters in this 44-minute conference talk by Sebastian Grandis from the University of Innsbruck and IQOQI. Discover the critical role of weak lensing in solving long-standing astrophysical uncertainties that have plagued cluster mass measurements, and understand how this breakthrough has advanced our ability to use galaxy clusters as precise cosmological probes. Learn about the technical challenges involved in cluster mass calibration, the innovative methodologies that weak lensing provides, and the implications for multi-probe cosmological analyses. Gain insights into how this solution fits within the broader landscape of combining multiple observational techniques to enhance our understanding of large-scale structure formation and cosmological parameters. The presentation was delivered as part of the New Synergies in Multi-Probe Cosmology conference at the Kavli Institute for Theoretical Physics, focusing on cutting-edge methods for combining observational probes across the electromagnetic spectrum to advance astrophysics and cosmology.