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

Saroj Adhikari, Sarah Shandera, Neal Dalal

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number052
JournalJournal of Cosmology and Astroparticle Physics
Volume2014
Issue number6
DOIs
StatePublished - Jun 1 2014

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics

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