Orateurs
Description
The Ultraviolet Near-Infrared Optical Northern Survey (UNIONS) is the largest deep weak lensing survey in the northern sky, combining multi-band imaging from telescopes on Mauna Kea over more than 5500 deg² at a depth comparable to LSST Year 1. The UNIONS collaboration have improved our understanding of the intrinsic alignments of galaxies, the tidal stripping of satellite galaxies in clusters, and new insights into the "lensing is low" tension. Earlier this year we released the first cosmological weak lensing results from UNIONS, constraining S₈ to about 8% using 2400 deg² in configuration- and harmonic-space. In this talk we will summarize these results before closing with an update on the status of the first UNIONS tomographic 3×2pt analysis over a footprint covering about 4800 deg².