{"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/the-completed-sdss-iv-extended-baryon-1","title":"The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: a multi-tracer analysis in Fourier space for measuring the cosmic structure growth and expansion rate","arxiv_id":"2007.09011","date":"2020-07-17","proceeding":null,"authors":["Gong-Bo Zhao","Yuting Wang","Atsushi Taruya","Weibing Zhang","Hector Gil-Marin","Arnaud de Mattia","Ashley J. Ross","Anand Raichoor","Cheng Zhao","Will J. Percival","Shadab Alam","Julian E. Bautista","Etienne Burtin","Chia-Hsun Chuang","Jiamin Hou","Kyle S. Dawson","Jean-Paul Kneib","Kazuya Koyama","Helion du Mas des Bourboux","Eva-Maria Mueller","Jeffrey A. Newman","John A. Peacock","Graziano Rossi","Vanina Ruhlmann-Kleider","Donald P. Schneider","Arman Shafieloo"],"abstract":"We perform a joint BAO and RSD analysis using the eBOSS DR16 LRG and ELG samples in the redshift range of $z\\in[0.6,1.1]$, and detect a RSD signal from the cross power spectrum at a $\\sim4\\sigma$ confidence level, i.e., $f\\sigma_8=0.317\\pm0.080$ at $z_{\\rm eff}=0.77$. Based on the chained power spectrum, which is a new development in this work to mitigate the angular systematics, we measurement the BAO distances and growth rate simultaneously at two effective redshifts, namely, $D_{\\rm M}/r_{\\rm d} \\ (z=0.70)=17.96\\pm0.51, \\ D_{\\rm H}/r_{\\rm d} \\ (z=0.70)=21.22\\pm1.20, \\ f\\sigma_8 \\ (z=0.70) =0.43\\pm0.05$, and $D_{\\rm M}/r_{\\rm d} \\ (z=0.845)=18.90\\pm0.78, \\ D_{\\rm H}/r_{\\rm d} \\ (z=0.845)=20.91\\pm2.86, \\ f\\sigma_8 \\ (z=0.845) =0.30\\pm0.08$. Combined with BAO measurements including those from the eBOSS DR16 QSO and Lyman-$\\alpha$ sample, our measurement has raised the significance level of a nonzero $\\Omega_{\\rm \\Lambda}$ to $\\sim11\\sigma$.","url_abs":"https://arxiv.org/abs/2007.09011v3","url_pdf":"https://arxiv.org/pdf/2007.09011v3.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":"the-completed-sdss-iv-extended-baryon-1","repo_url":"https://github.com/icosmology/eBOSS_DR16_LRGxELG","is_official":1,"mentioned_in_paper":1,"mentioned_in_github":1,"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}