{"paper":{"title":"Cluster Abundance Constraints on Quintessence Models","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Limin Wang, Paul J. Steinhardt (University of Pennsylvania)","submitted_at":"1998-04-02T02:48:25Z","abstract_excerpt":"The abundance of rich clusters is a strong constraint on the mass power spectrum. The current constraint can be expressed in the form $\\sigma_8 \\Omega_m^{\\gamma} = 0.5 \\pm 0.1$ where $\\sigma_8$ is the $rms$ mass fluctuation on 8 $h^{-1}$ Mpc scales, $\\Omega_m$ is the ratio of matter density to the critical density, and $\\gamma$ is model-dependent. In this paper, we determine a general expression for $\\gamma$ that applies to any models with a mixture of cold dark matter plus cosmological constant or quintessence (a time-evolving, spatially-inhomogeneous component with negative pressure) includi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9804015","kind":"arxiv","version":1},"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/9804015/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"}