{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/cosmological-constraints-from-cosmic","title":"Cosmological constraints from cosmic homogeneity","arxiv_id":"1904.06135","date":"2019-04-12","proceeding":null,"authors":["Pierros Ntelis","Adam James Hawken","Stephanie Escoffier","Anne Ealet","Andre Tilquin"],"abstract":"In this paper, we study the normalised characteristic scale of transition to cosmic homogeneity, $\\mathcal{R}_H/d_V$, as a cosmological probe. We use a compilation of SDSS galaxy samples, comprising more than $10^6$ galaxies in the redshift range $0.17 \\leq z \\leq 2.2$ within the largest comoving volume to date, $\\sim 8 h^{-3}\\mathrm{Gpc}^3$. We show that these samples can be described by a single bias model as a function of redshift. By combining our measurements with prior Cosmic Microwave Background and Lensing information from the Planck satellite, we constrain the total matter density ratio of the universe, $\\Omega_m = 0.363 \\pm 0.025$, and the Dark Energy density ratio, $\\Omega_{\\Lambda} = 0.649 \\pm 0.021$, improving the values from Planck alone by 31% and 28%, respectively. Our results are compatible with a flat $\\Lambda$CDM model. These results show the complementarity of the normalised homogeneity scale with other cosmological probes and open new roads to cosmometry.","url_abs":"https://arxiv.org/abs/1904.06135v2","url_pdf":"https://arxiv.org/pdf/1904.06135v2.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"cosmological-constraints-from-cosmic","repo_url":"https://github.com/lontelis/cosmopit","is_official":1,"mentioned_in_paper":1,"mentioned_in_github":0,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"syntology_url":null,"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}