Statistics – Computation
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...400l..43l&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 400, no. 2, p. L43-L46.
Statistics
Computation
127
Cosmology, Galaxies, Red Shift, Sky Surveys (Astronomy), Universe, Computational Astrophysics, Correlation, Dark Matter, Galactic Clusters, Relic Radiation, Spatial Distribution, Statistical Analysis
Scientific paper
We present results on the clustering of galaxies in the Stromlo-APM redshift survey, which consists of 1787 galaxies sampled at a rate of 1 in 20 at random from the APM Galaxy Survey to a magnitude limit of 17.15. An analysis of counts in cells, and a direct estimate of the two-point correlation function, indicate more large-scale structure than expected in a biased, scale-invariant, Omega = 1, cold dark matter (CDM) model. Unbiased Omega = 1 CDM models (which are compatible with the COBE microwave background anisotropy measurements) are allowed by our observations because peculiar motions enhance the amplitude of the clustering pattern measured in redshift space on large scales. However, consistency between the redshift survey results and the angular two-point correlation function determined from the APM Galaxy Survey favors biased, or low-density, models with enhanced clustering in real space compared with standard CDM.
Efstathiou George
Loveday Jon
Maddox Steve J.
Peterson Bruce A.
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