Cosmic homogeneity demonstrated with luminous red galaxies

David W. Hogg, Daniel J. Eisenstein, Michael R. Blanton, Neta A. Bahcall, J. Brinkmann, James E. Gunn, Donald P. Schneider

    Research output: Contribution to journalArticle

    Abstract

    We test the homogeneity of the universe at z ∼ 0.3 with the luminous red galaxy (LRG) spectroscopic sample of the Sloan Digital Sky Survey. First, the mean number N(R) of LRGs within completely surveyed LRG-centered spheres of comoving radius R is shown to be proportional to R3 at radii greater than R ∼ 70 h-1 Mpc. The test has the virtue that it does not rely on the assumption that the LRG sample has a finite mean density; its results show, however, that there is such a mean density. Second, the survey sky area is divided into 10 disjoint solid angular regions, and the fractional rms density variations of the LRG sample in the redshift range 0.2 < z < 0.35 among these (∼2 × 107 h-3 Mpc3) regions is found to be 7% of the mean density. This variance is consistent with typical biased ACDM models and puts very strong constraints on the quality of SDSS photometric calibration.

    Original languageEnglish (US)
    Pages (from-to)54-58
    Number of pages5
    JournalAstrophysical Journal
    Volume624
    Issue number1 I
    DOIs
    StatePublished - May 1 2005

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    homogeneity
    galaxies
    radii
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    calibration
    test

    Keywords

    • Cosmological parameters
    • Cosmology: observations
    • Galaxies: statistics
    • Large-scale structure of universe
    • Methods: statistical
    • Surveys

    ASJC Scopus subject areas

    • Space and Planetary Science

    Cite this

    Hogg, D. W., Eisenstein, D. J., Blanton, M. R., Bahcall, N. A., Brinkmann, J., Gunn, J. E., & Schneider, D. P. (2005). Cosmic homogeneity demonstrated with luminous red galaxies. Astrophysical Journal, 624(1 I), 54-58. https://doi.org/10.1086/429084

    Cosmic homogeneity demonstrated with luminous red galaxies. / Hogg, David W.; Eisenstein, Daniel J.; Blanton, Michael R.; Bahcall, Neta A.; Brinkmann, J.; Gunn, James E.; Schneider, Donald P.

    In: Astrophysical Journal, Vol. 624, No. 1 I, 01.05.2005, p. 54-58.

    Research output: Contribution to journalArticle

    Hogg, DW, Eisenstein, DJ, Blanton, MR, Bahcall, NA, Brinkmann, J, Gunn, JE & Schneider, DP 2005, 'Cosmic homogeneity demonstrated with luminous red galaxies', Astrophysical Journal, vol. 624, no. 1 I, pp. 54-58. https://doi.org/10.1086/429084
    Hogg DW, Eisenstein DJ, Blanton MR, Bahcall NA, Brinkmann J, Gunn JE et al. Cosmic homogeneity demonstrated with luminous red galaxies. Astrophysical Journal. 2005 May 1;624(1 I):54-58. https://doi.org/10.1086/429084
    Hogg, David W. ; Eisenstein, Daniel J. ; Blanton, Michael R. ; Bahcall, Neta A. ; Brinkmann, J. ; Gunn, James E. ; Schneider, Donald P. / Cosmic homogeneity demonstrated with luminous red galaxies. In: Astrophysical Journal. 2005 ; Vol. 624, No. 1 I. pp. 54-58.
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    AU - Blanton, Michael R.

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