[100.03] The Clustering of Photometric Luminous Red Galaxies and its Cosmological Implications

AAS 207th Meeting, 8-12 January 2006
Session 100 Cosmology, Early Universe, Cosmic Distance Scale I
Oral, Tuesday, 2:00-3:30pm, January 10, 2006, Salon 1

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[100.03] The Clustering of Photometric Luminous Red Galaxies and its Cosmological Implications

N. Padmanabhan (Princeton U.), D.J. Schlegel (LBNL), U. Seljak (Princeton U.; ICTP, Trieste)

We present the first clustering results for a sample of ~ 600,000 photometrically selected luminous red galaxies from the Sloan Digital Sky Survey. The sample covers an area of ~ 4000 sq. deg, and is approximately volume limited from z=0.2 to z=0.6. These galaxies have accurate photometric redshifts (\sigma_z = 0.03) with calibrated error distributions. We compute the 3D power spectrum of these objects, and find evidence for power (2 \sigma at 600 h^-1 {\rm Mpc} , 5.5 \sigma at 300 h^-1 {\rm Mpc}) on large scales. We also find evidence for baryonic oscillations at 100 h^-1 {\rm Mpc} in the power spectrum at ~2.5 \sigma. We discuss the cosmological implications of these results, both in comparison with other galaxy surveys, as well as in conjunction with CMB and SN data.

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