Higher moments of primordial non-Gaussianity and N-body simulations
- Institute for Gravitation and the Cosmos, The Pennsylvania State University, University Park, PA, 16802 (United States)
- Department of Astronomy, University of Illinois, 1002 W. Green St., Urbana, IL, 61801 (United States)
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.
- OSTI ID:
- 22373500
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 06; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
Similar Records
Primordial non-Gaussianity in the bispectra of large-scale structure
Large-scale velocities and primordial non-Gaussianity