Multiresolution Analysis of Cosmological N-Body Simulations and Comparison with Two-Dimensional Galaxy Distributions for Estimating Large-Scale Structure

Details Multiresolution Analysis of Cosmological N-Body Simulations and Comparison with Two-Dimensional Galaxy Distributions for Estimating Large-Scale Structure Multiresolution Analysis of Cosmological N-Body Simulations and Comparison with Two-Dimensional Galaxy Distributions for Estimating Large-Scale Structure

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004pasj...56..581u&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.56, No.4, pp. 581-590

Astronomy and Astrophysics

Astronomy

2

Cosmology, Galaxies: Clustering, Gravitation, Numerical Methods

Scientific paper

A multiresolution analysis was performed to estimate the large-scale structure of cosmological N- body simulations. To explore relations between the multiresolution analysis and the galaxy distributions, a method that is familiar to image processing engineering was utilized. We proposed a new technique for quantifying the large-scale structures, and found that this is useful to discriminate differences in galaxy distributions among power-law simulations. We next applied the multiresolution analysis to CDM simulations, and also obtained a confirmation of the usefulness of this analysis; our new technique had advantages in clearly distinguishing differences in galaxy distributions in CDM models. We finally compared the galaxy distributions in the two-dimensional observational data (LEDA2d subsample) with those in CDM mock samples, and found that the standard CDM model does not reproduce the galaxy distributions in our universe.

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