The angular power spectrum of galaxies from early Sloan Digital Sky Survey data

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

    Research output: Contribution to journalReview articlepeer-review


    We compute the angular power spectrum Cl from 1.5 million galaxies in early Sloan Digital Sky Survey (SDSS) data on large angular scales, l≲600. The data set covers about 160 deg2, with a characteristic depth on the order of 1 h-1 Gpc in the faintest (21 < r* < 22) of our four magnitude bins. Cosmological interpretations of these results are presented in a companion paper by Dodelson and coworkers. The data in all four magnitude bins are consistent with a simple flat "concordance" model with nonlinear evolution and linear bias factors on the order of unity. Nonlinear evolution is particularly evident for the brightest galaxies. A series of tests suggests that systematic errors related to seeing, reddening, etc. are negligible, which bodes well for the 60-fold larger sample that the SDSS is currently collecting. Uncorrelated error bars and well-behaved window functions make our measurements a convenient starting point for cosmological model fitting.

    Original languageEnglish (US)
    Pages (from-to)191-205
    Number of pages15
    JournalAstrophysical Journal
    Issue number1 I
    StatePublished - May 20 2002


    • Galaxies: statistics
    • Large-scale structure of universe
    • Methods: data analysis

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science


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