{"paper":{"title":"Constraints on changes in fundamental constants from a cosmologically distant OH absorber/emitter","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"C. L. Carilli (NRAO), F. Combes (Observatoire de Paris - LERMA), F. H. Briggs (ATNF/ANU), G. I. Langston (NRAO), G. Rocha (Cambridge), J. T. Stocke (University of Colorado), K. M. Menten (MPIfR), N. Kanekar (NRAO), R. Subrahmanyan (ATNF), T. Wiklind (STScI)","submitted_at":"2005-10-27T00:10:37Z","abstract_excerpt":"We have detected the four 18cm OH lines from the $z \\sim 0.765$ gravitational lens toward PMN J0134-0931. The 1612 and 1720 MHz lines are in conjugate absorption and emission, providing a laboratory to test the evolution of fundamental constants over a large lookback time. We compare the HI and OH main line absorption redshifts of the different components in the $z \\sim 0.765$ absorber and the $z \\sim 0.685$ lens toward B0218+357 to place stringent constraints on changes in $F \\equiv g_p [\\alpha^2/\\mu]^{1.57}$. We obtain $[\\Delta F/F] = (0.44 \\pm 0.36^{\\rm stat} \\pm 1.0^{\\rm syst}) \\times 10^{"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0510760","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0510760/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}