Quasar-Lyman α forest cross-correlation from BOSS DR11: Baryon Acoustic Oscillations
- Institute of Theoretical Physics, University of Zurich, Winterthurerstrasse 190, 8057 Zurich (Switzerland)
- Department of Physics and Astronomy, University of California, 4129 Frederick Reines Hall, Irvine, CA, 92697 (United States)
- APC, Université Paris Diderot-Paris 7, CNRS/IN2P3, CEA, Observatoire de Paris, 10, rue A. Domon and L. Duquet, Paris (France)
- Institut de Ciències del Cosmos (IEEC/UB), Martí i Franquès 1, Barcelona, 08028 Catalonia (Spain)
- Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA (United States)
- Brookhaven National Laboratory, Blgd 510, Upton, NY, 11375 (United States)
- CEA, Centre de Saclay, IRFU, Gif-sur-Yvette, 91191 France (France)
- Department of Astronomy, University of Washington, Box 351580, Seattle, WA, 98195 (United States)
- Apache Point Observatory and New Mexico State University, P.O. Box 59, Sunspot, NM, 88349-0059 (United States)
We measure the large-scale cross-correlation of quasars with the Lyα forest absorption, using over 164,000 quasars from Data Release 11 of the SDSS-III Baryon Oscillation Spectroscopic Survey. We extend the previous study of roughly 60,000 quasars from Data Release 9 to larger separations, allowing a measurement of the Baryonic Acoustic Oscillation (BAO) scale along the line of sight c/(H(z = 2.36)r{sub s}) = 9.0±0.3 and across the line of sight D{sub A}(z = 2.36)/r{sub s} = 10.8±0.4, consistent with CMB and other BAO data. Using the best fit value of the sound horizon from Planck data (r{sub s} = 147.49 Mpc), we can translate these results to a measurement of the Hubble parameter of H(z = 2.36) = 226±8 km s{sup −1} Mpc{sup −1} and of the angular diameter distance of D{sub A}(z = 2.36) = 1590±60 Mpc. The measured cross-correlation function and an update of the code to fit the BAO scale (baofit) are made publicly available.
- OSTI ID:
- 22373569
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 05; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
Similar Records
The large-scale quasar-Lyman α forest cross-correlation from BOSS
Baryon acoustic oscillations in the Lyα forest of BOSS quasars