The SDSS DR7 Galaxy Angular Power Spectrum: Volume-Limits and Galaxy Morphology

Abstract

We use a quadratic estimator with KL-compression to calculate the angular power spectrum of a volume-limited Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7) galaxy sample out to l = 200. We also determine the angular power spectrum of selected subsamples with photometric redshifts z < 0.3 and 0.3 < z < 0.4 to examine the possible evolution of the angular power spectrum, as well as early-type and late-type galaxy subsamples to examine the relative linear bias. In addition, we calculate the angular power spectrum of the SDSS DR7 main galaxy sample in a ~ 53.7 square degree area out to l = 1600 to determine the SDSS DR7 angular power spectrum to high multipoles. We perform a χ^2 fit to compare the resulting angular power spectra to theoretical nonlinear angular power spectra to extract cosmological parameters and the linear bias. We find the best-fit cosmological parameters of Ω_m = 0.267 +- 0.038 and Ω_b = 0.045 +- 0.012. We find an overall linear bias of b = 1.075 +- 0.056, an early-type bias of b_e = 1.727 +- 0.065, and a late-type bias of b_l = 1.256 +- 0.051. Finally, we present evidence of a selective misclassification of late-type galaxies as stars by the SDSS photometric data reduction pipeline in areas of high stellar density (e.g., at low Galactic latitudes).

11 pages, 12 figures, accepted for publication in MNRAS

References in corpus (9)

• CMB power spectrum parameter degeneracies in the era of precision cosmology
• The shape of the SDSS DR5 galaxy power spectrum
• Cosmological baryonic and matter densities from 600,000 SDSS Luminous Red Galaxies with photometric redshifts
• Clustering of Sloan Digital Sky Survey III Photometric Luminous Galaxies: The Measurement, Systematics and Cosmological Implications
• Acoustic scale from the angular power spectra of SDSS-III DR8 photometric luminous galaxies
• New Neutrino Mass Bounds from Sloan Digital Sky Survey III Data Release 8 Photometric Luminous Galaxies
• Evolution of the Clustering of Photometrically Selected SDSS Galaxies
• Precision Measurements of Higher-Order Angular Galaxy Correlations Using 11 Million SDSS Galaxies
• Angular Power Spectrum Estimation using High Performance Reconfigurable Computing

Cited by in corpus (3)

• Extracting cosmological information from the angular power spectrum of the 2MASS Photometric Redshift catalogue
• 3-dimensional spherical analyses of cosmological spectroscopic surveys
• On the Clustering of Compact Galaxy Pairs in Dark Matter Haloes