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Journal article
Cosmological constraints from the SDSS luminous red galaxies
Physical review. D, Particles, fields, gravitation, and cosmology, v 74(12)
01 Dec 2006
Abstract
We measure the large-scale real-space power spectrum P(k) using luminous red galaxies (LRGs) in the Sloan Digital Sky Survey (SDSS) and use this measurement to sharpen constraints on cosmological parameters from the Wilkinson Microwave Anisotropy Probe (WMAP). We employ a matrix-based power spectrum estimation method using Pseudo-Karhunen-Loeve eigenmodes, producing uncorrelated minimum-variance measurements in 20 k-bands of both the clustering power and its anisotropy due to redshift-space distortions, with narrow and well-behaved window functions in the range 0.01h/Mpc < k < 0.2h/Mpc. Results from the LRG and main galaxy samples are consistent, with the former providing higher signal-to-noise. Our results are robust to omitting angular and radial density fluctuations and are consistent between different parts of the sky. They provide a striking confirmation of the predicted large-scale Lambda CDM power spectrum. Combining only SDSS LRG and WMAP data places robust constraints on many cosmological parameters that complement prior analyses of multiple data sets. The LRGs provide independent cross-checks on Omega(m) and the baryon fraction in good agreement with WMAP. Within the context of flat Lambda CDM models, our LRG measurements complement WMAP by sharpening the constraints on the matter density, the neutrino density and the tensor amplitude by about a factor of 2, giving Omega(m)=0.24 +/- 0.02 (1 sigma), (95%) and r < 0.3 (95%). Baryon oscillations are clearly detected and provide a robust measurement of the comoving distance to the median survey redshift z=0.35 independent of curvature and dark energy properties. Within the Lambda CDM framework, our power spectrum measurement improves the evidence for spatial flatness, sharpening the curvature constraint Omega(tot)=1.05 +/- 0.05 from WMAP alone to Omega(tot)=1.003 +/- 0.010. Assuming Omega(tot)=1, the equation of state parameter is constrained to w=-0.94 +/- 0.09, indicating the potential for more ambitious future LRG measurements to provide precision tests of the nature of dark energy. All these constraints are essentially independent of scales k > 0.1h/Mpc and associated nonlinear complications, yet agree well with more aggressive published analyses where nonlinear modeling is crucial.
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Details
- Title
- Cosmological constraints from the SDSS luminous red galaxies
- Creators
- Max Tegmark - Massachusetts Institute of TechnologyDaniel J. Eisenstein - University of ArizonaMichael A. Strauss - Princeton UniversityDavid H. Weinberg - The Ohio State UniversityMichael R. Blanton - New York UniversityJoshua A. Frieman - University of ChicagoMasataka Fukugita - University of TokyoJames E. Gunn - Princeton UniversityAndrew J. S. Hamilton - University of Colorado BoulderGillian R. Knapp - Princeton UniversityRobert C. Nichol - University of PortsmouthJeremiah P. Ostriker - Princeton UniversityNikhil Padmanabhan - Princeton UniversityWill J. Percival - University of PortsmouthDavid J. Schlegel - Lawrence Berkeley National LaboratoryDonald P. Schneider - Pennsylvania State UniversityRoman Scoccimarro - New York UniversityUros Seljak - International Centre for Theoretical PhysicsHee-Jong Seo - University of ArizonaMolly SwansonAlexander S. Szalay - Johns Hopkins UniversityMichael S. Vogeley - Drexel UniversityJaiyul Yoo - The Ohio State UniversityIdit Zehavi - Case Western Reserve UniversityKevork Abazajian - Los Alamos National LaboratoryScott F. Anderson - University of WashingtonJames Annis - FermilabNeta A. Bahcall - Princeton UniversityBruce Bassett - University of Cape TownAndreas Berlind - New York UniversityJon Brinkmann - New Mexico State UniversityTamas Budavari - Johns Hopkins UniversityFrancisco CastanderAndrew Connolly - University of PittsburghIstvan Csabai - Eötvös Loránd UniversityMamoru Doi - University of TokyoDouglas P. Finkbeiner - Princeton UniversityBruce Gillespie - New Mexico State UniversityKarl Glazebrook - Johns Hopkins UniversityGregory S. Hennessy - United States Department of the NavyDavid W. Hogg - New York UniversityZeljko Ivezic - Princeton UniversityBhuvnesh Jain - University of PennsylvaniaDavid Johnston - California Institute of TechnologyStephen Kent - FermilabDonald Q. Lamb - University of ChicagoBrian C. Lee - Lawrence Berkeley National LaboratoryHuan Lin - FermilabJon Loveday - University of SussexRobert H. Lupton - Princeton UniversityJeffrey A. Munn - United States Department of the NavyKaike Pan - New Mexico State UniversityChangbom Park - Seoul National UniversityJohn Peoples - FermilabJeffrey R. Pier - United States Department of the NavyAdrian Pope - Johns Hopkins UniversityMichael Richmond - Rochester Institute of TechnologyConstance Rockosi - University of ChicagoRyan Scranton - University of PittsburghRavi K. Sheth - University of PennsylvaniaAlbert Stebbins - FermilabChristopher Stoughton - FermilabIstvan Szapudi - Hungarian Academy of SciencesDouglas L. Tucker - FermilabDaniel E. Vanden BerkBrian Yanny - FermilabDonald G. York - University of Chicago
- Publication Details
- Physical review. D, Particles, fields, gravitation, and cosmology, v 74(12)
- Publisher
- Amer Physical Soc
- Number of pages
- 34
- Grant note
- PP/C50613X/1 / Science and Technology Facilities Council; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000243171800028
- Scopus ID
- 2-s2.0-33845429601
- Other Identifier
- 991019168565704721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics
- Physics, Particles & Fields