Cosmic Microwave Background and Density Fluctuations from Strings plus Inflation

1998/09/04 by Carlo Contaldi, Mark Hindmarsh, João Magueijo +1 · 16 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #astro-ph

paper · pdf · doi:10.1103/physrevlett.82.2034

published as Phys.Rev.Lett. 82 (1999) 2034-2037

arxiv created 1998/09/04 · openalex publication_date 1999/03/08 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

In cosmological models where local cosmic strings are formed at the end of a period of inflation, the perturbations are seeded both by the defects and by the quantum fluctuations, with similar amplitudes. In a flat cosmology with zero cosmological constant and 5% baryonic component, strings plus inflation fit the observational data much better than each component individually. The large-angle cosmic microwave background spectrum is mildly tilted, for Harrison-Zeldovich inflationary fluctuations. It then rises to a thick Doppler bump, covering \ensuremathℓ\phantom\rule0ex0ex=\phantom\rule0ex0ex200--600, modulated by soft secondary undulations. The standard cold dark matter antibiasing problem is cured.

Citations

• Can Inflation be Falsified?

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