{"paper":{"title":"Cosmological Constraints from Hubble parameter $H(z)$ and SN Ia observations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"(2)Key Laboratory of Particle Astrophysics, (3)Department of Astronomy, 4), (4)Kavli Institute for theoretical Physics China, (5)Department of Physics, Bao-Quan Wang (5)((1)School of Mathematical Sciences, Beijing Normal University, Cheng Hao (1), Chinese Academy of Sciences, Chinese Academy of Sciences (KITPC/ITP-CAS), Dezhou University), Hui Lin (1), Institute of High Energy Physics, Institute of Theoretical Physics, Qiang Yuan (2), Tong-Jie Zhang (3, Xiao Wang (1), Ze-Long Yi (3)","submitted_at":"2008-04-19T09:42:08Z","abstract_excerpt":"In this paper, we use a set of observational $H(z)$ data (OHD) to constrain the $\\Lambda$CDM cosmology. This data set can be derived from the differential ages of the passively evolving galaxies. Meanwhile, the $\\mathcal {A}$-parameter, which describes the Baryonic Acoustic Oscillation (BAO) peak, and the newly measured value of the Cosmic Microwave Background (CMB) shift parameter $\\mathcal {R}$ are used to present combinational constraints on the same cosmology. The combinational constraints favor an accelerating flat universe while the flat $\\Lambda$CDM cosmology is also analyzed in the sam"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0804.3135","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"}