Topological Defects and CMB anisotropies : Are the predictions reliable ?

Abstract

We consider a network of topological defects which can partly decay into neutrinos, photons, baryons, or Cold Dark Matter. We find that the degree-scale amplitude of the cosmic microwave background (CMB) anisotropies as well as the shape of the matter power spectrum can be considerably modified when such a decay is taken into account. We conclude that present predictions concerning structure formation by defects might be unreliable.

14 pages, accepted for publication in PRD

References in corpus (2)

• Lithium-6: A Probe of the Early Universe
• A Measurement of the Angular Power Spectrum of the Microwave Background Made from the High Chilean Andes

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