{"schema":"pubphys.bundle/1","record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"645d44d5f670902e167e8c6f8acca7845feb8c8e5fa4d222993a21d8f247e424","created":"2026-10-03T07:18:02Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011","ed264645728bed1ec687ad4bd3875390250b8f5cab07bf83f47c6553d9b6de0f"],"salt":"5a526300899c069c6e36a9c2ab1938264d4a80173b9011a02a976fcc2d193fd5","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"value","assisted_by":[],"external_id":"cosmo.hubble-tension.ladder-agreement","kind":"well-posed","literature_status":"contested","n":"1","parents":[{"note":"","parent_revision":"ed264645728bed1ec687ad4bd3875390250b8f5cab07bf83f47c6553d9b6de0f","relation":"special_case"}],"plain":"Distances to nearby galaxies can be calibrated with pulsating stars (Cepheids), the brightest old red giant stars, or carbon-rich giant stars. These methods should agree if none has a hidden bias.","posed_since":"2019","precise":"Using one JWST sample of type Ia supernova host galaxies, determine the mean distance-modulus offsets between Cepheid, tip of the red giant branch (TRGB) and J-region asymptotic giant branch (JAGB) calibrations, and the resulting h from each. An answer is each offset with uncertainty below 0.02 mag and an explanation of any nonzero offset.","problem_ref":null,"references":"","settled_by":"A shared, blinded JWST analysis of the same hosts by independent teams with identical supernova samples.","status_note":"CCHP (Freedman et al. 2025, arXiv:2408.06153) obtained $h = 0.704 \\pm 0.012\\,(\\mathrm{stat}) \\pm 0.013\\,(\\mathrm{sys})$ from TRGB with 24 supernova calibrators, and from JWST data alone $h = 0.688\\,(\\mathrm{TRGB})$ and $0.678\\,(\\mathrm{JAGB})$, while SH0ES reports mean method differences near $0.03\\,\\mathrm{mag}$ and $h$ near 0.73.","title":"Do TRGB, JAGB and Cepheid ladders give the same Hubble 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