Fitting CMB data with cosmic strings and inflation

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dc.creatorBevis, Neil
dc.creatorHindmarsh, Mark
dc.creatorKunz, Martin
dc.creatorUrrestilla, Jon
dc.date2007-02-08
dc.date2008-01-25
dc.date.accessioned2026-07-07T11:21:07Z
dc.date.available2026-07-07T11:21:07Z
dc.descriptionWe perform a multiparameter likelihood analysis to compare measurements of the cosmic microwave background (CMB) power spectra with predictions from models involving cosmic strings. Adding strings to the standard case of a primordial spectrum with power-law tilt n, we find a 2-sigma detection of strings: f_10 = 0.11 +/- 0.05, where f_10 is the fractional contribution made by strings in the temperature power spectrum (at multipole l = 10). CMB data give moderate preference to the model n = 1 with cosmic strings over the standard zero-strings model with variable tilt. When additional non-CMB data are incorporated, the two models become on a par. With variable n and these extra data, we find that f_10 < 0.11, which corresponds to G mu < 0.7x10^-6 (where mu is the string tension and G is the gravitational constant).
dc.description4 pages, 2 figures, 1 table; matches journal version
dc.identifierhttps://arxiv.org/abs/astro-ph/0702223
dc.identifierhttp://arxiv.org/abs/astro-ph/0702223
dc.identifierPhys.Rev.Lett.100:021301,2008
dc.identifierdoi:10.1103/PhysRevLett.100.021301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194172
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titleFitting CMB data with cosmic strings and inflation
dc.typetext

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