Signature of Primordial Non-Gaussianity on Matter Power Spectrum

Simple item page
dc.creatorTaruya, Atsushi
dc.creatorKoyama, Kazuya
dc.creatorMatsubara, Takahiko
dc.date2008-08-29
dc.date2008-12-25
dc.date.accessioned2026-07-07T12:26:59Z
dc.date.available2026-07-07T12:26:59Z
dc.descriptionEmploying the perturbative treatment of gravitational clustering, we discuss possible effects of primordial non-Gaussianity on the matter power spectrum. As gravitational clustering develops, the coupling between different Fourier modes of density perturbations becomes important and the primordial non-Gaussianity which intrinsically possesses a non-trivial mode-correlation can affect the late-time evolution of the power spectrum. We quantitatively estimate the non-Gaussian effect on power spectrum from the perturbation theory. The potential impact on the cosmological parameter estimation using the power spectrum are investigated based on the Fisher-matrix formalism. In addition, on the basis of the local biasing prescription, non-Gaussian effects on the galaxy power spectrum are considered, showing that the scale-dependent biasing arises from a local-type primordial non-Gaussianity. On the other hand, an equilateral-type non-Gaussianity does not induce such scale-dependence because of weaker mode-correlations between small and large Fourier modes.
dc.description15 pages, 7 figures, accepted for publication in Phys.Rev.D
dc.identifierhttps://arxiv.org/abs/0808.4085
dc.identifierhttp://arxiv.org/abs/0808.4085
dc.identifierPhys.Rev.D78:123534,2008
dc.identifierdoi:10.1103/PhysRevD.78.123534
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/215059
dc.subjectAstrophysics
dc.titleSignature of Primordial Non-Gaussianity on Matter Power Spectrum
dc.typetext

Files

Collections

arXiv