Journal article
The Three-Dimensional Power Spectrum of Galaxies from the Sloan Digital Sky Survey
The Astrophysical journal, v 606(2), pp 702-740
10 May 2004
Abstract
We measure the large-scale real-space power spectrum P(k) by using a sample of 205,443 galaxies from the Sloan Digital Sky Survey, covering 2417 effective square degrees with mean redshift z similar to 0.1. We employ a matrix- based method using pseudo-Karhunen-Loeve eigenmodes, producing uncorrelated minimum-variance measurements in 22 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 0.02 h Mpc super(-1) < k < 0.3 h Mpc super(- 1). We pay particular attention to modeling, quantifying, and correcting for potential systematic errors, nonlinear redshift distortions, and the artificial red-tilt caused by luminosity-dependent bias. Our results are robust to omitting angular and radial density fluctuations and are consistent between different parts of the sky. Our final result is a measurement of the real-space matter power spectrum P(k) up to an unknown overall multiplicative bias factor. Our calculations suggest that this bias factor is independent of scale to better than a few percent for k < 0.1 h Mpc super(-1), thereby making our results useful for precision measurements of cosmological parameters in conjunction with data from other experiments such as the Wilkinson Microwave Anisotropy Probe satellite. The power spectrum is not well-characterized by a single power law but unambiguously shows curvature. As a simple characterization of the data, our measurements are well fitted by a flat scale-invariant adiabatic cosmological model with h [Omega] sub(m) = 0.213 plus or minus 0.023 and capital sigma sub(8) = 0.89 plus or minus 0.02 for L sub(*) galaxies, when fixing the baryon fraction [Omega] sub(b)/[Omega] sub(m) = 0.17 and the Hubble parameter h = 0.72; cosmological interpretation is given in a companion paper.
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Details
- Title
- The Three-Dimensional Power Spectrum of Galaxies from the Sloan Digital Sky Survey
- Creators
- Max Tegmark - University of PennsylvaniaMichael Blanton - New York UniversityMichael Strauss - Princeton UniversityFiona Hoyle - Drexel UniversityDavid Schlegel - Princeton UniversityRoman Scoccimarro - New York UniversityMichael Vogeley - Drexel UniversityDavid Weinberg - The Ohio State UniversityIdit Zehavi - University of ChicagoAndreas Berlind - University of ChicagoTamas Budavari - Johns Hopkins UniversityAndrew Connolly - University of PittsburghDaniel Eisenstein - University of ArizonaDouglas Finkbeiner - Princeton UniversityJoshua Frieman - University of ChicagoJames Gunn - Princeton UniversityAndrew HamiltonLam Hui - FermilabBhuvnesh Jain - University of PennsylvaniaDavid Johnston - University of ChicagoStephen Kent - FermilabHuan Lin - FermilabReiko Nakajima - University of PennsylvaniaRobert Nichol - Carnegie Mellon UniversityJeremiah Ostriker - Princeton UniversityAdrian Pope - Johns Hopkins UniversityRyan Scranton - University of PittsburghUros Seljak - Princeton UniversityRavi Sheth - University of PittsburghAlbert Stebbins - FermilabAlexander Szalay - Johns Hopkins UniversityFor the SDSS Collaboration
- Publication Details
- The Astrophysical journal, v 606(2), pp 702-740
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000221261900007
- Scopus ID
- 2-s2.0-2442558077
- Other Identifier
- 991019168357204721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics