Статья

The clustering of luminous red galaxies in the Sloan Digital Sky Survey imaging data

Nikhil PadmanabhanJoseph Henry Laboratories, Jadwin Hall Princeton University, Princeton, NJ 08544, USADavid J. SchlegelPhysics Division, Lawrence Berkeley National Laboratories, Berkeley, CA 94720-8160, USAUroš SeljakJoseph Henry Laboratories, Jadwin Hall, Princeton University, Princeton, NJ 08544, USAA. MakarovJoseph Henry Laboratories, Jadwin Hall Princeton University, Princeton, NJ 08544, USANeta A. BahcallDepartment of Astrophysical Sciences Peyton Hall Princeton University Princeton NJ 08544 USAMichael R. BlantonDepartment of Physics, New York University, 4 Washington Pl., New York, NY 10003, USAJ. BrinkmannDaniel J. EisensteinSteward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ, 85721 USADouglas P. FinkbeinerDepartment of Astrophysical Sciences Peyton Hall Princeton University Princeton NJ 08544 USAJames E. GunnDepartment of Astrophysical Sciences Peyton Hall Princeton University Princeton NJ 08544 USADavid W. HoggDepartment of Physics, New York University, 4 Washington Pl., New York, NY 10003, USAŽeljko Ivezić[Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195, USA]G. R. KnappDepartment of Astrophysical Sciences Peyton Hall Princeton University Princeton NJ 08544 USAJ. LovedayAstronomy Centre, University of Sussex, Falmer, Brighton BN1 9QHRobert H. LuptonDepartment of Astrophysical Sciences Peyton Hall Princeton University Princeton NJ 08544 USARobert C. NicholInstitute of Cosmology and Gravitation, University of Portsmouth, Portsmouth, Portsmouth PO1 2EGDonald P. SchneiderDepartment of Astronomy and Astrophysics, The Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802, USAMichael A. StraussDepartment of Astrophysical Sciences Peyton Hall Princeton University Princeton NJ 08544 USAMax Tegmark#N# MIT Kavli Institute for Astrophysics & Space Research, Cambridge, MA 02139, USADonald G. YorkDepartment of Astronomy and Astrophysics & Enrico Fermi Institute, 5640 South Ellis Avenue, Chicago, IL 60637, USA

2007en

ABI

Аннотация

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).

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Идентификаторы

DOI: 10.1111/j.1365-2966.2007.11593.x

Цитирования и источники

Цитирований: 2Использованных источников: 0

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