On percolation as a cosmological test

Abstract

view Abstract Citations (61) References (25) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS On percolation as a cosmological test Dekel, A. ; West, M. J. Abstract Difficulties in the use of percolation as a complementary statistic for the galaxy clustering pattern are pointed out by studying simple toy models and dynamical N-body models that represent the competing clustering scenarios. The percolation properties are found not to be very sensitive to the presence of pancakes and strings once they are clumpy, and hence they do not distinguish properly between models that are very different. In the case of very smooth pancakes, the ability to percolate depends on sampling parameters, such as the mean number density and the volume, in a way which is unknown a priori because it depends on the same properties that the test ought to measure. This problem could, in principle, be eased by using volume-limited samples of high mean number density (an order of magnitude denser than the CfA redshift survey volume limited at 4000 km/s) and by comparing to models of identical number density and volume. An alternative approach, based on the sampling effects themselves, may provide a qualitative test for pancakes in samples of lower densities. Publication: The Astrophysical Journal Pub Date: January 1985 DOI: 10.1086/162806 Bibcode: 1985ApJ...288..411D Keywords: Cosmology; Galactic Clusters; Space Density; Spatial Distribution; Astronomical Models; Computational Astrophysics; Many Body Problem; Percolation; Statistical Tests; Astrophysics full text sources ADS |