Second-order matter perturbations in a LambdaCDM cosmology and non-Gaussianity

We obtain exact expressions for the effect of primordial non-Gaussianity on the matter density perturbation up to second order in a LambdaCDM cosmology, fully accounting for the general relativistic corrections arising on scales comparable with the Hubble radius. We present our results both in the P...

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Detalles Bibliográficos
Autores principales: Bartolo, Nicola, Matarrese, Sabino, Pantano, Ornella, Riotto, Antonio
Formato: info:eu-repo/semantics/article
Lenguaje:eng
Publicado: Class. Quantum Gravity 2010
Materias:
Astrophysics and Astronomy
Acceso en línea:https://dx.doi.org/10.1088/0264-9381/27/12/124009
http://cds.cern.ch/record/1243709
Descripción
Sumario:We obtain exact expressions for the effect of primordial non-Gaussianity on the matter density perturbation up to second order in a LambdaCDM cosmology, fully accounting for the general relativistic corrections arising on scales comparable with the Hubble radius. We present our results both in the Poisson gauge and in the comoving and synchronous gauge, which are relevant for comparison to different cosmological observables.

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