{"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-one-dimensional-ly-alpha-forest-power","title":"The one-dimensional Ly-alpha forest power spectrum from BOSS","arxiv_id":"1306.5896","date":"2013-06-25","proceeding":null,"authors":["Nathalie Palanque-Delabrouille","Christophe Yèche","Arnaud Borde","Jean-Marc Le Goff","Graziano Rossi","Matteo Viel","Éric Aubourg","Stephen Bailey","Julian Bautista","Michael Blomqvist","Adam Bolton","James S. Bolton","Nicolás G. Busca","Bill Carithers","Rupert A. C. Croft","Kyle S. Dawson","Timothée Delubac","Andreu Font-Ribera","Shirley Ho","David Kirkby","Khee-Gan Lee","Daniel Margala","Jordi Miralda-Escudé","Demitri Muna","Adam D. Myers","Pasquier Noterdaeme","Isabelle Pâris","Patrick Petitjean","Matthew M. Pieri","James Rich","Emmanuel Rollinde","Nicholas P. Ross","David J. Schlegel","Donald P. Schneider","Anže Slosar","David H. Weinberg"],"abstract":"We have developed two independent methods to measure the one-dimensional power spectrum of the transmitted flux in the Lyman-$\\alpha$ forest. The first method is based on a Fourier transform, and the second on a maximum likelihood estimator. The two methods are independent and have different systematic uncertainties. The determination of the noise level in the data spectra was subject to a novel treatment, because of its significant impact on the derived power spectrum. We applied the two methods to 13,821 quasar spectra from SDSS-III/BOSS DR9 selected from a larger sample of over 60,000 spectra on the basis of their high quality, large signal-to-noise ratio, and good spectral resolution. The power spectra measured using either approach are in good agreement over all twelve redshift bins from $<z> = 2.2$ to $<z> = 4.4$, and scales from 0.001 $\\rm(km/s)^{-1}$ to $0.02 \\rm(km/s)^{-1}$. We determine the methodological and instrumental systematic uncertainties of our measurements. We provide a preliminary cosmological interpretation of our measurements using available hydrodynamical simulations. The improvement in precision over previously published results from SDSS is a factor 2--3 for constraints on relevant cosmological parameters. For a $\\Lambda$CDM model and using a constraint on $H_0$ that encompasses measurements based on the local distance ladder and on CMB anisotropies, we infer $\\sigma_8 =0.83\\pm0.03$ and $n_s= 0.97\\pm0.02$ based on \\ion{H}{i} absorption in the range $2.1<z<3.7$.","url_abs":"https://arxiv.org/abs/1306.5896v2","url_pdf":"https://arxiv.org/pdf/1306.5896v2.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-one-dimensional-ly-alpha-forest-power","repo_url":"https://github.com/Chris-Pedersen/LaCE","is_official":0,"mentioned_in_paper":0,"mentioned_in_github":1,"framework":"none","reach":{"status":"ok"}},{"paper_slug":"the-one-dimensional-ly-alpha-forest-power","repo_url":"https://github.com/andreufont/LyaCosmoParams","is_official":0,"mentioned_in_paper":0,"mentioned_in_github":1,"framework":"none","reach":{"status":"ok"}}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"syntology_url":null,"atlas_url":"https://app.syntology.ai/?focus=1306.5896","mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}