The Clustering of Photometric Luminous Red Galaxies and its Cosmological Implications

Details The Clustering of Photometric Luminous Red Galaxies and its Cosmological Implications The Clustering of Photometric Luminous Red Galaxies and its Cosmological Implications

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...20710003p&link_type=abstract

American Astronomical Society Meeting 207, #100.03; Bulletin of the American Astronomical Society, Vol. 37, p.1328

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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 (σ z = 0.03) with calibrated error distributions. We compute the 3D power spectrum of these objects, and find evidence for power (2 σ at 600 h-1 Mpc , 5.5 σ at 300 h-1 Mpc) on large scales. We also find evidence for baryonic oscillations at 100 h-1 Mpc in the power spectrum at ˜ 2.5 σ . 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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