Statistics – Computation
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...305....1m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 305, June 1, 1986, p. 1-8.
Statistics
Computation
41
Cold Plasmas, Computational Astrophysics, Functions (Mathematics), Galactic Evolution, Mass Distribution, Astronomical Models, Bias, Cosmology, Density Distribution, Galactic Clusters, Universe
Scientific paper
Identification of only high peaks of mass density with visible galaxies pushes up the amplitude of the two-point correlation of critical density cold-particle universe simulations into better agreement with the observed distribution of galaxies. The three-point function, or bispectrum in transform space, permits a fully independent test of this hypothesis. In a formulation of biasing which can treat a connected density maximum as more than a single galaxy, the authors find that sufficient amplification of the underlying density field is achieved with a 1 σ bias, and the value of the three-point correlation is Q ≈ 1, over length scales 1(Ωh2)-1Mpc < r < 25(Ωh2)-1Mpc.
Fry James N.
Melott Adrian L.
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