Journal article
Cosmological constraints from the clustering of the Sloan Digital Sky Survey DR7 luminous red galaxies
Monthly notices of the Royal Astronomical Society, v 404(1), pp 60-85
Jan 2010
Abstract
We present the power spectrum of the reconstructed halo density field derived from a sample of luminous red galaxies (LRGs) from the Sloan Digital Sky Survey (SDSS) Seventh Data Release (DR7). The halo power spectrum has a direct connection to the underlying dark matter power for k≤ 0.2 h Mpc−1, well into the quasi-linear regime. This enables us to use a factor of ∼8 more modes in the cosmological analysis than an analysis with k
max= 0.1 h Mpc−1, as was adopted in the SDSS team analysis of the DR4 LRG sample. The observed halo power spectrum for 0.02 < k < 0.2 h Mpc−1 is well fitted by our model: χ2= 39.6 for 40 degrees of freedom for the best-fitting Λ cold dark matter (ΛCDM) model. We find Ωm
h
2(n
s/0.96)1.2= 0.141+0.010
−0.012 for a power-law primordial power spectrum with spectral index n
s and Ωb
h
2= 0.022 65 fixed, consistent with cosmic microwave background measurements. The halo power spectrum also constrains the ratio of the comoving sound horizon at the baryon-drag epoch to an effective distance to z= 0.35: r
s/DV
(0.35) = 0.1097+0.0039
−0.0042. Combining the halo power spectrum measurement with the Wilkinson Microwave Anisotropy Probe (WMAP) 5 year results, for the flat ΛCDM model we find Ωm= 0.289 ± 0.019 and H
0= 69.4 ± 1.6 km s−1 Mpc−1. Allowing for massive neutrinos in ΛCDM, we find
eV at the 95 per cent confidence level. If we instead consider the effective number of relativistic species N
eff as a free parameter, we find N
eff= 4.8+1.8
−1.7. Combining also with the Kowalski et al. supernova sample, we find Ωtot= 1.011 ± 0.009 and w=−0.99 ± 0.11 for an open cosmology with constant dark energy equation of state w. The power spectrum and a module to calculate the likelihoods are publicly available at http://lambda.gsfc.nasa.gov/toolbox/lrgdr/.
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Details
- Title
- Cosmological constraints from the clustering of the Sloan Digital Sky Survey DR7 luminous red galaxies
- Creators
- Beth A Reid - 1Institute of Space Sciences (CSIC-IEEC), UAB, Barcelona 08193, SpainWill J Percival - 4Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth P01 2EGDaniel J Eisenstein - 5Steward Observatory, University of Arizona, 933 N. Cherry Ave., Tucson, AZ 85121, USALicia Verde - 1Institute of Space Sciences (CSIC-IEEC), UAB, Barcelona 08193, SpainDavid N Spergel - 3Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USARamin A Skibba - 8Max-Planck-Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg, GermanyNeta A Bahcall - 3Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USATamas Budavari - 9Department of Physics and Astronomy, The Johns Hopkins University, 3701 San Martin Drive, Baltimore, MD 21218, USAJoshua A Frieman - 10Particle Astrophysics Center, Fermilab, PO Box 500, Batavia, IL 60510, USAMasataka Fukugita - 12Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, JapanJ. Richard Gott - 3Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USAJames E Gunn - 3Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USAŽeljko Ivezić - 13Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195, USAGillian R Knapp - 3Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USARichard G Kron - 14Department of Astronomy and Astrophysics, The University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60615, USARobert H Lupton - 3Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USATimothy A McKay - 15Departments of Physics and Astronomy, University of Michigan, Ann Arbor, MI, 48109, USAAvery Meiksin - 16SUPA; Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJRobert C Nichol - 4Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth P01 2EGAdrian C Pope - 17Los Alamos National Laboratory, PO Box 1663, Los Alamos, NM 87545, USADavid J Schlegel - 18Lawrence Berkeley National Lab, 1 Cyclotron Road, MS 50R5032, Berkeley, CA 94720, USADonald P Schneider - 19Department of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA 16802, USAChris Stoughton - 20Fermilab, PO Box 500, Batavia, IL 60510, USAMichael A Strauss - 3Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USAAlexander S Szalay - 9Department of Physics and Astronomy, The Johns Hopkins University, 3701 San Martin Drive, Baltimore, MD 21218, USAMax Tegmark - 21Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USAMichael S Vogeley - 22Department of Physics, Drexel University, Philadelphia, PA 19104, USADavid H Weinberg - 23Department of Astronomy, The Ohio State University, 140 West, 18th Avenue, Columbus, OH 43210, USADonald G York - 14Department of Astronomy and Astrophysics, The University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60615, USAIdit Zehavi - 25Department of Astronomy, Case Western Reserve University, Cleveland, OH 44106, USA
- Publication Details
- Monthly notices of the Royal Astronomical Society, v 404(1), pp 60-85
- Publisher
- Blackwell Publishing Ltd; Oxford, UK
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000276794600030
- Scopus ID
- 2-s2.0-77954074610
- Other Identifier
- 991014877769204721
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- Domestic collaboration
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- Astronomy & Astrophysics