The three-dimensional power spectrum from angular clustering of galaxies in early sloan digital sky survey data

Scott Dodelson, Vijay K. Narayanan, Max Tegmark, Ryan Scranton, Tamas Budavári, Andrew Connolly, Istvan Csabai, Daniel Eisenstein, Joshua A. Frieman, James E. Gunn, Lam Hui, Bhuvnesh Jain, David Johnston, Stephen Kent, Jon Loveday, Robert C. Nicnol, Liam O'Connell, Roman Scoccimarro, Ravi K. Sheth, Albert StebbinsMichael A. Strauss, Alexander S. Szalay, István Szapudi, Michael S. Vogeley, Idit Zehavi, James Annis, Neta A. Bahcall, Jon Brinkman, Mamoru Doi, Masataka Fukugita, Greg Hennessy, Željko Ivezić, Gillian R. Knapp, Peter Kunszt, Don Q. Lamb, Brian C. Lee, Robert H. Lupton, Jeffrey A. Munn, John Peoples, Jeffrey R. Pier, Constance Rockosi, David Schlegel, Christopher Stoughton, Douglas L. Tucker, Brian Yanny, Donald G. York

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Early photometric data from the Sloan Digital Sky Survey (SDSS) contain angular positions for 1.5 million galaxies. In companion papers, the angular correlation function w(θ) and two-dimensional power spectrum Cl of these galaxies are presented. Here we invert Limber's equation to extract the three-dimensional power spectrum from the angular results. We accomplish this using an estimate of dn/dz, the redshift distribution of galaxies in four different magnitude slices in the SDSS photometric catalog. The resulting three-dimensional power spectrum estimates from w(θ) and Cl agree with each other and with previous estimates over a range in wavenumbers 0.03 < k/(h Mpc-1) < 1. The galaxies in the faintest magnitude bin (21 < r* < 22, which have median redshift zm = 0.43) are less clustered than the galaxies in the brightest magnitude bin (18 < r* < 19 with zm = 0.17), especially on scales where nonlinearities are important. The derived power spectrum agrees with that of Szalay et al., who go directly from the raw data to a parametric estimate of the power spectrum. The strongest constraints on the shape parameter Γ come from the faintest galaxies (in the magnitude bin 21 < r* < 22), from which we infer Γ = 0.14-0.06+0.11 (95% CL).

    Original languageEnglish (US)
    Pages (from-to)140-156
    Number of pages17
    JournalAstrophysical Journal
    Volume572
    Issue number1 I
    DOIs
    StatePublished - Jun 10 2002

    Keywords

    • Galaxies: clusters: general
    • Galaxies: statistics

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

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