Alex Ji @alexji.bsky.social · 03/09/2026Nierenberg: Euclid/LSST/Roman will get 100k's of new galaxy-galaxy lenses! Overall hints of very dense perturbers relative to CDM, interesting to see similar to streams #KICPDM 100
Alex Ji @alexji.bsky.social · 03/09/2026Projections for the future: with 200 lenses in the coming surveys, can reach half mode mass to 10^7 Msun arxiv.org/abs/2604.05237 #KICPDMarxiv.orgMeasurement of the minimum cold dark matter halo mass with strong gravitational lensingWe explore the lowest mass limit that can be placed on the halo mass function in CDM using 28 strong gravitational lenses. For this purpose, we study an extreme model in which the halo mass function a... 100
Alex Ji @alexji.bsky.social · 03/09/2026Ollie Jackson: use cosmological simulations to test flux ratio constraints, three main sources of scatter: Poisson scatter, host-to-host scatter, dominated by projection angle scatter. Most subhalos if going along host major axis. Clumpiness (sub/subsubhalos) matters too. #KICPDM 100
