Statistical comparison of galaxy formation models: The bispectrum

Journal Article · Wed May 15 04:00:00 EDT 1985 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/163169· OSTI ID:5009887

Fry, J N; Melott, A L

To discriminate between galaxy-formation models that give similar two-point correlation functions, we look to higher moments, specifically the three-point function in transform space or bispectrum, for an ensemble of numerical simulations. We find different behaviors of this statistic 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.

• Research Organization: Institute for Theoretical Physics, University of California, Santa Barbara
• DOE Contract Number: AC02-80ER10773
• OSTI ID: 5009887
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 292:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
640106 -- Astrophysics & Cosmology-- Cosmology
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMPUTERIZED SIMULATION
COSMOLOGICAL MODELS
COSMOLOGY
DISTRIBUTION
ELEMENTARY PARTICLES
FERMIONS
GALACTIC EVOLUTION
GALAXY CLUSTERS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATHEMATICS
NEUTRINOS
NUMERICAL ANALYSIS
SIMULATION
SPATIAL DISTRIBUTION
SPECTRA
STATISTICS
THREE-DIMENSIONAL CALCULATIONS
TWO-DIMENSIONAL CALCULATIONS