Statistics – Computation
Scientific paper
Sep 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.171..141b&link_type=abstract
(IAU, European Regional Astronomy Meeting, 11th, La Laguna, Spain, July 3-8, 1989) Astrophysics and Space Science (ISSN 0004-640
Statistics
Computation
8
Astronomical Models, Computational Astrophysics, Galactic Clusters, Galactic Evolution, Red Shift, Spatial Resolution, Computerized Simulation, Dark Matter, Galactic Structure
Scientific paper
A simple method for extracting a galaxy sample from a model of a large-scale structure formation is developed on the basis of the pancake model of Buchert (1989). The extraction problem is solved by following three procedures: (1) obtaining statistically fair samples, (2) obtaining high spatial resolution of pancakes, and (3) performing dynamical thresholding of density. Results are presented showing that the first 'galaxies' show up at a redshift of about 4. At a redsift of about 0, the large-scale distribution obtained was similar to many observed features, including voids, filaments, rich clusters, and infall motion on clusters. The galaxies form before or simultaneously with the formation of large-scale structures (pancakes).
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