Statistical comparison of galaxy formation models - The bispectrum

Details Statistical comparison of galaxy formation models - The bispectrum Statistical comparison of galaxy formation models - The bispectrum

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...292..395f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 292, May 15, 1985, p. 395-403. NASA-supported research.

Statistics

Computation

25

Astronomical Models, Computational Astrophysics, Cosmology, Galactic Clusters, Galactic Evolution, Statistical Analysis, Computerized Simulation, Correlation, Mass Distribution, Power Spectra

Scientific paper

To discriminate between galaxy-formation models that give similar two-point correlation functions, the authors look to higher moments, specifically the three-point function in transform space or bispectrum, for an ensemble of numerical simulations. They find different behaviors of this statistics that can be used to distinguish between classes of models. Up to the uncertainty in identifying the galaxy distribution with the mass distribution in the models, the results seem to prefer the isothermal or the cold-particle models. No model, however, agrees in all detail with the observational bispectrum of the Shane-Wirtanen galaxy catalog.

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