{"paper":{"title":"Galaxy cluster number count data constraints on cosmological parameters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Marrone, Bharat Ratra, G. L. Fogli, L. Campanelli, T. Kahniashvili","submitted_at":"2011-10-11T09:24:59Z","abstract_excerpt":"[Abridged] We use data on massive galaxy clusters ($M_{\\rm cluster} > 8 \\times 10^{14} h^{-1} M_\\odot$ within a comoving radius of $R_{\\rm cluster} = 1.5 h^{-1}\\Mpc$) in the redshift range $0.05 \\lesssim z \\lesssim 0.83$ to place constraints, simultaneously, on the nonrelativistic matter density parameter $\\Omega_m$, on the amplitude of mass fluctuations $\\sigma_8$, on the index $n$ of the power-law spectrum of the density perturbations, and on the Hubble constant $H_0$, as well as on the equation-of-state parameters $(w_0,w_a)$ of a smooth dark energy component.\n  For the first time, we prope"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1110.2310","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":""},"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"}