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A numerical study of non-Gaussianity in the curvaton scenario

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A numerical study of non-Gaussianity in the curvaton scenario. / Malik, K. A.; Lyth, D. H.
In: Journal of Cosmology and Astroparticle Physics, 2006.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Malik, KA & Lyth, DH 2006, 'A numerical study of non-Gaussianity in the curvaton scenario', Journal of Cosmology and Astroparticle Physics. https://doi.org/10.1088/1475-7516/2006/09/008

APA

Malik, K. A., & Lyth, D. H. (2006). A numerical study of non-Gaussianity in the curvaton scenario. Journal of Cosmology and Astroparticle Physics. https://doi.org/10.1088/1475-7516/2006/09/008

Vancouver

Malik KA, Lyth DH. A numerical study of non-Gaussianity in the curvaton scenario. Journal of Cosmology and Astroparticle Physics. 2006. doi: 10.1088/1475-7516/2006/09/008

Author

Malik, K. A. ; Lyth, D. H. / A numerical study of non-Gaussianity in the curvaton scenario. In: Journal of Cosmology and Astroparticle Physics. 2006.

Bibtex

@article{9da93f70c5df4932a5b1ff19cb451624,
title = "A numerical study of non-Gaussianity in the curvaton scenario",
abstract = "We study the curvaton scenario using gauge-invariant second order perturbation theory and solving the governing equations numerically. Focusing on large scales we calculate the non-linearity parameter fNL in the two-fluid curvaton model and compare our results with previous analytical studies employing the sudden decay approximation. We find good agreement of the two approaches for large curvaton energy densities at curvaton decay, Ωσdec, but significant differences of up to 10% for small Ωσdec.",
keywords = "cosmological perturbation theory, inflation",
author = "Malik, {K. A.} and Lyth, {D. H.}",
year = "2006",
doi = "10.1088/1475-7516/2006/09/008",
language = "English",
journal = "Journal of Cosmology and Astroparticle Physics",
publisher = "IOP Publishing",

}

RIS

TY - JOUR

T1 - A numerical study of non-Gaussianity in the curvaton scenario

AU - Malik, K. A.

AU - Lyth, D. H.

PY - 2006

Y1 - 2006

N2 - We study the curvaton scenario using gauge-invariant second order perturbation theory and solving the governing equations numerically. Focusing on large scales we calculate the non-linearity parameter fNL in the two-fluid curvaton model and compare our results with previous analytical studies employing the sudden decay approximation. We find good agreement of the two approaches for large curvaton energy densities at curvaton decay, Ωσdec, but significant differences of up to 10% for small Ωσdec.

AB - We study the curvaton scenario using gauge-invariant second order perturbation theory and solving the governing equations numerically. Focusing on large scales we calculate the non-linearity parameter fNL in the two-fluid curvaton model and compare our results with previous analytical studies employing the sudden decay approximation. We find good agreement of the two approaches for large curvaton energy densities at curvaton decay, Ωσdec, but significant differences of up to 10% for small Ωσdec.

KW - cosmological perturbation theory

KW - inflation

U2 - 10.1088/1475-7516/2006/09/008

DO - 10.1088/1475-7516/2006/09/008

M3 - Journal article

JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

ER -