The clustering of luminous red galaxies in the Sloan Digital Sky Survey imaging data
| Autor: | D. P. Finkbeiner, Max Tegmark, N. A. Bahcall, Jonathan Loveday, D. G. York, Gillian R. Knapp, James E. Gunn, Alexey Makarov, Robert H. Lupton, M. R. Blanton, Daniel J. Eisenstein, David J. Schlegel, Michael A. Strauss, Nikhil Padmanabhan, J. Brinkmann, U. Seljak, Donald P. Schneider, Z. Ivezic, David W. Hogg, Robert C. Nichol |
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| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Physics
Cosmology and Gravitation Matter power spectrum media_common.quotation_subject Astrophysics (astro-ph) Spectral density FOS: Physical sciences Astronomy and Astrophysics Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Comoving distance Galaxy Redshift Baryon Space and Planetary Science Sky Cluster analysis Astrophysics::Galaxy Astrophysics media_common |
| Zdroj: | Padmanabhan, N, Schlegel, D J, Seljak, U, Makarov, A, Bahcall, N A, Blanton, M R, Brinkmann, J, Eisenstein, D J, Finkbeiner, D P, Gunn, J E, Hogg, D W, Ivezic, Z, Knapp, G R, Loveday, J, Lupton, R H, Nichol, R C, Schneider, D P, Strauss, M A, Tegmark, M & York, D G 2007, ' The clustering of luminous red galaxies in the Sloan Digital Sky Survey imaging data ', Monthly Notices of the Royal Astronomical Society, vol. 378, no. 3, pp. 852-872 . https://doi.org/10.1111/j.1365-2966.2007.11593.x |
| Popis: | We present the 3D real space clustering power spectrum of a sample of \~600,000 luminous red galaxies (LRGs) measured by the Sloan Digital Sky Survey (SDSS), using photometric redshifts. This sample of galaxies ranges from redshift z=0.2 to 0.6 over 3,528 deg^2 of the sky, probing a volume of 1.5 (Gpc/h)^3, making it the largest volume ever used for galaxy clustering measurements. We measure the angular clustering power spectrum in eight redshift slices and combine these into a high precision 3D real space power spectrum from k=0.005 (h/Mpc) to k=1 (h/Mpc). We detect power on gigaparsec scales, beyond the turnover in the matter power spectrum, on scales significantly larger than those accessible to current spectroscopic redshift surveys. We also find evidence for baryonic oscillations, both in the power spectrum, as well as in fits to the baryon density, at a 2.5 sigma confidence level. The statistical power of these data to constrain cosmology is ~1.7 times better than previous clustering analyses. Varying the matter density and baryon fraction, we find \Omega_M = 0.30 \pm 0.03, and \Omega_b/\Omega_M = 0.18 \pm 0.04, The detection of baryonic oscillations also allows us to measure the comoving distance to z=0.5; we find a best fit distance of 1.73 \pm 0.12 Gpc, corresponding to a 6.5% error on the distance. These results demonstrate the ability to make precise clustering measurements with photometric surveys (abridged). Comment: 23 pages, 27 figures, submitted to MNRAS |
| Databáze: | OpenAIRE |
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