Signatures of Primordial Non-Gaussianity in the Large-Scale Structure of the Universe

Details Signatures of Primordial Non-Gaussianity in the Large-Scale Structure of the Universe Signatures of Primordial Non-Gaussianity in the Large-Scale Structure of the Universe

2005-01-27

arxiv.org/abs/astro-ph/0501614v2

JCAP 0510 (2005) 010

Astronomy and Astrophysics

Astrophysics

8 pages, LaTeX file; Revised to match the final version accepted for publication on JCAP (some comments and one figure added)

Scientific paper

10.1088/1475-7516/2005/10/010

We discuss how primordial (e.g. inflationary) non-Gaussianity in the cosmological perturbations is left imprinted in the Large-Scale Structure of the universe. Our findings show that the information on the primordial non-Gaussianity set on super-Hubble scales flows into Post-Newtonian terms, leaving an observable imprint in the Large-Scale Structure. Future high-precision measurements of the statistics of the dark matter density and peculiar velocity fields will allow to pin down the primordial non-Gaussianity, thus representing a tool complementary to studies of the Cosmic Microwave Background anisotropies.

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