The Angular Power Spectrum of EDSGC Galaxies

Details The Angular Power Spectrum of EDSGC Galaxies The Angular Power Spectrum of EDSGC Galaxies

2000-11-03

arxiv.org/abs/astro-ph/0011069v2

Astrophys.J. 555 (2001) 547

Astronomy and Astrophysics

Astrophysics

11 pages, 9 figures, version to appear in ApJ

Scientific paper

10.1086/323328

We determine the angular power spectrum, C_l, of the Edinburgh/Durham Southern Galaxy Catalog (EDSGC) and use this statistic to constrain cosmological parameters. Our methods for determining C_l, and the parameters that affect it are based on those developed for the analysis of cosmic microwave background maps. We expect them to be useful for future surveys. Assuming flat cold dark matter models with a cosmological constant (constrained by COBE/DMR and local cluster abundances), and a scale--independent bias, b, we find good fits to the EDSGC angular power spectrum with 1.11 < b < 2.35 and 0.2 < Omega_m < 0.55 at 95% confidence. These results are not significantly affected by the ``integral constraint'' or extinction by interstellar dust, but may be by our assumption of Gaussianity.

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