Journal article
Baryon acoustic oscillations in the Sloan Digital Sky Survey Data Release 7 galaxy sample
Monthly notices of the Royal Astronomical Society, v 401(4), pp 2148-2168
Jan 2010
Abstract
The spectroscopic Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7) galaxy sample represents the final set of galaxies observed using the original SDSS target selection criteria. We analyse the clustering of galaxies within this sample, including both the luminous red galaxy and main samples, and also include the 2-degree Field Galaxy Redshift Survey data. In total, this sample comprises 893 319 galaxies over 9100 deg2. Baryon acoustic oscillations (BAO) are observed in power spectra measured for different slices in redshift; this allows us to constrain the distance-redshift relation at multiple epochs. We achieve a distance measure at redshift z= 0.275, of r
s(z
d)/DV
(0.275) = 0.1390 ± 0.0037 (2.7 per cent accuracy), where r
s(z
d) is the comoving sound horizon at the baryon-drag epoch, DV
(z) ≡[(1 +z)2
D
2
A
cz/H(z)]1/3, D
A(z) is the angular diameter distance and H(z) is the Hubble parameter. We find an almost independent constraint on the ratio of distances DV
(0.35)/DV
(0.2) = 1.736 ± 0.065, which is consistent at the 1.1σ level with the best-fitting Λ cold dark matter model obtained when combining our z= 0.275 distance constraint with the Wilkinson Microwave Anisotropy Probe 5-year (WMAP5) data. The offset is similar to that found in previous analyses of the SDSS DR5 sample, but the discrepancy is now of lower significance, a change caused by a revised error analysis and a change in the methodology adopted, as well as the addition of more data. Using WMAP5 constraints on Ωb
h
2 and Ωc
h
2, and combining our BAO distance measurements with those from the Union supernova sample, places a tight constraint on Ωm= 0.286 ± 0.018 and H
0= 68.2 ± 2.2 km s−1 Mpc−1 that is robust to allowing Ωk≠ 0 and w≠−1. This result is independent of the behaviour of dark energy at redshifts greater than those probed by the BAO and supernova measurements. Combining these data sets with the full WMAP5 likelihood constraints provides tight constraints on both Ωk=−0.006 ± 0.008 and w=−0.97 ± 0.10 for a constant dark energy equation of state.
Metrics
Details
- Title
- Baryon acoustic oscillations in the Sloan Digital Sky Survey Data Release 7 galaxy sample
- Creators
- Will J Percival - 1Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama building, Portsmouth P01 3FXBeth A Reid - 2Institute of Space Sciences (CSIC-IEEC), UAB, Barcelona 08193, SpainDaniel J Eisenstein - 5Steward Observatory, University of Arizona, 933 N. Cherry Ave., Tucson, AZ 85121, USANeta A Bahcall - 4Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USATamas Budavari - 6Department of Physics and Astronomy, The Johns Hopkins University, 3701 San Martin Drive, Baltimore, MD 21218, USAJoshua A Frieman - 7Particle Astrophysics Center, Fermilab, PO Box 500, Batavia, IL 60510, USAMasataka Fukugita - 9Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, JapanJames E Gunn - 4Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USAŽeljko Ivezić - 10Department of Astronomy, University of Washington Box 351580, Seattle, WA 98195, USAGillian R Knapp - 4Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USARichard G Kron - 11Department of Astronomy and Astrophysics, The University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAJon Loveday - 12Astronomy Centre, University of Sussex, Falmer, Brighton BN1 9QHRobert H Lupton - 4Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USATimothy A McKay - 13Departments of Physics and Astronomy, University of Michigan, Ann Arbor, MI 48109, USAAvery Meiksin - 14SUPA; Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJRobert C Nichol - 1Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama building, Portsmouth P01 3FXAdrian C Pope - 15Los Alamos National Laboratory, PO Box 1663, Los Alamos, NM 87545, USADavid J Schlegel - 16Lawrence Berkeley National Lab, 1 Cyclotron Road, MS 50R5032, Berkeley, CA 94720, USADonald P Schneider - 17Department of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA 16802, USADavid N Spergel - 4Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USAChris Stoughton - 19Fermilab, PO Box 500, Batavia, IL 60510, USAMichael A Strauss - 4Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USAAlexander S Szalay - 6Department of Physics and Astronomy, The Johns Hopkins University, 3701 San Martin Drive, Baltimore, MD 21218, USAMax Tegmark - 20Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USAMichael S Vogeley - 21Department of Physics, Drexel University, Philadelphia, PA 19104, USADavid H Weinberg - 22Department of Astronomy, The Ohio State University, Columbus, OH 43210, USADonald G York - 11Department of Astronomy and Astrophysics, The University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USAIdit Zehavi - 24Department of Astronomy, Case Western Reserve University, Cleveland, OH 44106, USA
- Publication Details
- Monthly notices of the Royal Astronomical Society, v 401(4), pp 2148-2168
- Publisher
- Blackwell Publishing Ltd; Oxford, UK
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000273687800002
- Scopus ID
- 2-s2.0-74549128653
- Other Identifier
- 991014878109004721
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- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics