New result for the Hubble tension from TDCOSMO using JWST. From three time-delay lenses, they find H0= 73.5 \u00b1 2.8 km\/s\/Mpc, assuming the internal mass-sheet parameter \u03bb_int = 1.<\/p>\n\n\n\n
With new JWST imaging and spectroscopy, improved lens-environment estimates, and substantially revised modeling, the result is almost identical to the previous HST-based result for the same three lenses under the same \u03bb_int = 1 assumption, H0 = 73.6 \u00b1 2.6, while the scatter between the individual lenses is reduced. One caveat is the assumption \u03bb_int =1, which will be treated as a free parameter in the forthcoming TDCOSMO-2026 analysis. However, existing TDCOSMO constraints put \u03bb_int close to unity (or slightly above), with no empirical indication that freeing it should necessarily pull H0 toward the Planck value.<\/p>\n\n\n\n
Another independent measurement, again landing on the high-H0 side. <\/p>\n","protected":false},"excerpt":{"rendered":" New result for the Hubble tension from TDCOSMO using JWST. From three time-delay lenses, they find H0= 73.5 \u00b1 2.8 km\/s\/Mpc, assuming the internal mass-sheet parameter \u03bb_int = 1. With new JWST imaging and spectroscopy, improved lens-environment estimates, and substantially revised … Continue reading
arXiv:2608.27566<\/a><\/p>\n\n\n\n