A cosmic string-specific signature on the cosmic microwave background

1 April 1994

journal article
Published by American Astronomical Society in The Astrophysical Journal

Vol. 425, 365-371
https://doi.org/10.1086/173992

Abstract

Using an analytical model for the string network we show that the kurtosis of cosmic microwave background (CMB) temperature gradient maps is a good statistic to distinguish between the cosmic string model and inflationary models of structure formation. The difference between the stringy and inflationary value for the kurtosis is inversely proportional to the angular resolution and to the number of strings per Hubble volume of the strings' scaling solution. If strings are indeed responsible for CMB anisotropies then experiments with resolutions of a couple of arcminutes or smaller could determine it using this statistic.Comment: 18 pages, 9 figures (available from the authors), BROWN-HET-911 (June 1993), accepted for publ. in Astrophys. J., uses LATE

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