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Tests for primordial non-Gaussianity

Verde, Licia and Jimenez, Raul and Kamionkowski, Marc and Matarrese, Sabino (2001) Tests for primordial non-Gaussianity. Monthly Notices of the Royal Astronomical Society, 325 (1). pp. 412-418. ISSN 0035-8711. doi:10.1046/j.1365-8711.2001.04459.x.

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We investigate the relative sensitivities of several tests for deviations from Gaussianity in the primordial distribution of density perturbations. We consider models for non-Gaussianity that mimic that which comes from inflation as well as that which comes from topological defects. The tests we consider involve the cosmic microwave background (CMB), large-scale structure, high-redshift galaxies, and the abundances and properties of clusters. We find that the CMB is superior at finding non-Gaussianity in the primordial gravitational potential (as inflation would produce), while observations of high-redshift galaxies are much better suited to find non-Gaussianity that resembles that expected from topological defects. We derive a simple expression that relates the abundance of high-redshift objects in non-Gaussian models to the primordial skewness.

Item Type:Article
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URLURL TypeDescription Paper
Kamionkowski, Marc0000-0001-7018-2055
Additional Information:© 2001 RAS. Received: 02 February 2001. Accepted: 23 February 2001. Published: 11 July 2001. LV and RJ thank the Caltech theoretical astrophysics group for hospitality. MK was supported in part by NSF AST-0096023, NASA NAG5-8506, and DoE DE-FG03-92-ER40701.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG03-92-ER40701
Subject Keywords:methods: analytical, galaxies: clusters: general, cosmic microwave background, cosmology: theory, large-scale structure of Universe
Issue or Number:1
Record Number:CaltechAUTHORS:20200602-124838541
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Official Citation:Licia Verde, Raul Jimenez, Marc Kamionkowski, Sabino Matarrese, Tests for primordial non-Gaussianity, Monthly Notices of the Royal Astronomical Society, Volume 325, Issue 1, July 2001, Pages 412–418,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103640
Deposited By: Rebecca Minjarez
Deposited On:03 Jun 2020 19:54
Last Modified:16 Nov 2021 18:23

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