Non-Gaussian spectra and the search for cosmic strings

1997/02/14 by João Magueijo, Joao Magueijo, Magueijo, Joao +2
Computer Science · Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #Computational Physics and Python Applications #Cosmology and Gravitation Theories #FOS: Physical sciences #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/9702131

Contribution to the proceedings of ``Topological defects and CMB'', Rome, October 96

arxiv created 1997/02/14 · openalex publication_date 1997/02/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present a new tool for relating theory and experiment suited for non-Gaussian theories: non-Gaussian spectra. It does for non-Gaussian theories what the angular power spectrum C_ℓ does for Gaussian theories. We then show how previous studies of cosmic strings have over rated their non-Gaussian signature. More realistic maps are not visually stringy. However non-Gaussian spectra will accuse their stringiness. We finally summarise the steps of an undergoing experimental project aiming at searching for cosmic strings by means of this technique.

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