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- W1668234746 abstract "Doppler peaks in the cosmic microwave background may allow us to distinguish among the two classes of theories-inflationary models and topological defect scenarios-which attempt to explain the origin of structure formation in the universe. We consider density perturbations seeded by global textures in a universe dominated by cold dark matter. We calculate the height and the position of the primary peak and conclude a different signature than the one obtained if the initial perturbations were due to the amplification of quantum fluctuations of a scalar field during a generic inflationary era. We believe that our analysis holds for all kinds of global defects and general global scalar fields. We then question the validity of the temporal coherence of the sources, assumed in the texture models. We finally discuss the temporal coherence of cosmic string sources, through correlations of the energy and momentum in an evolving cosmic string network in Minkowski space." @default.
- W1668234746 created "2016-06-24" @default.
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- W1668234746 date "1996-11-29" @default.
- W1668234746 modified "2023-09-27" @default.
- W1668234746 title "Can Doppler Peaks discriminate among Inflationary models and Topological Defect scenarios" @default.
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