Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-05-12
Mon.Not.Roy.Astron.Soc.378:852-872,2007
Astronomy and Astrophysics
Astrophysics
23 pages, 27 figures, submitted to MNRAS
Scientific paper
10.1111/j.1365-2966.2007.11593.x
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).
Bahcall Neta A.
Blanton Michael R.
Brinkmann John
Eisenstein Daniel J.
Finkbeiner Douglas Paul
No associations
LandOfFree
The Clustering of Luminous Red Galaxies in the Sloan Digital Sky Survey Imaging Data does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Clustering of Luminous Red Galaxies in the Sloan Digital Sky Survey Imaging Data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Clustering of Luminous Red Galaxies in the Sloan Digital Sky Survey Imaging Data will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-596778