{"paper":{"title":"New limits on $\\Omega_{\\Lambda}$ and $\\Omega_M$ from old galaxies at high redshift","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Brazil), J. A. S. Lima (Universidade Federal do Rio Grande do Norte, J. S. Alcaniz, Natal, RN","submitted_at":"1999-02-20T14:21:56Z","abstract_excerpt":"The ages of two old galaxies (53W091, 53W069) at high redshifts are used to constrain the value of the cosmological constant in a flat universe ($\\Lambda$CDM) and the density parameter $\\Omega_M$ in Friedmann-Robertson-Walker (FRW) models with no $\\Lambda$-term. In the case of $\\Lambda$CDM models, the quoted galaxies yield two lower limits for the vacuum energy density parameter, $\\Omega_\\Lambda \\geq 0.42$ and $\\Omega_\\Lambda \\geq 0.5$, respectively. Although compatible with the limits from statistics of gravitational lensing (SGL) and cosmic microwave background (CMB), these lower bounds are "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9902298","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/9902298/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"}