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Title: Higher moments of primordial non-Gaussianity and N-body simulations

We perform cosmological N-body simulations with non-Gaussian initial conditions generated from two independent fields. The dominant contribution to the perturbations comes from a purely Gaussian field, but we allow the second field to have local non-Gaussianity that need not be weak. This scenario allows us to adjust the relative importance of non-Gaussian contributions beyond the skewness, producing a scaling of the higher moments different from (and stronger than) the scaling in the usual single field local ansatz. We compare semi-analytic prescriptions for the non-Gaussian mass function, large scale halo bias, and stochastic bias against the simulation results. We discuss applications of this work to large scale structure measurements that can test a wider range of models for the primordial fluctuations than is usually explored.
Authors:
;  [1] ;  [2]
  1. Institute for Gravitation and the Cosmos, The Pennsylvania State University, University Park, PA, 16802 (United States)
  2. Department of Astronomy, University of Illinois, 1002 W. Green St., Urbana, IL, 61801 (United States)
Publication Date:
OSTI Identifier:
22373500
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 06; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASYMMETRY; COMPARATIVE EVALUATIONS; DISTURBANCES; FLUCTUATIONS; MASS; PERTURBATION THEORY; SIMULATION; STATISTICS; STOCHASTIC PROCESSES