Astronomy and Astrophysics – Astronomy
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.250...75c&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 250, May 1, 1991, p. 75-88. Research supported by SERC
Astronomy and Astrophysics
Astronomy
34
Astronomical Catalogs, Galactic Clusters, Galaxies, Spatial Distribution, Topology, Universe, Cosmology, Galactic Evolution, Gravitational Effects, Monte Carlo Method, Red Shift
Scientific paper
A quantitative topology-measuring algorithm is used to investigate the pattern of galaxy-clustering revealed by the Shane-Wirtanen galaxy counts. The Euler-Poincare characteristic of high- and low-density regions is examined, and the results are compared with those expected for a two-dimensional Gaussian random field. The large data set shows clear departures from Gaussian topology when viewed at high resolution (i.e., when smoothed on a small angular scale), but the behavior rapidly approaches that of the Gaussian as the resolution is lowered. These results are consistent with models where large-scale structures grow via gravitational instability from Gaussian quantum fluctuations generated in an inflationary epoch.
Coles Peter
Plionis Manolis
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