Primordial Adiabatic Fluctuations from Cosmic Defects

P. P. Avelino; C. J. A. P. Martins

doi:10.1103/PhysRevLett.85.1370

Primordial Adiabatic Fluctuations from Cosmic Defects

P. P. Avelino and C. J. A. P. Martins

Phys. Rev. Lett. 85, 1370 – Published 14 August 2000

Abstract

In the context of “two-metric” theories of gravity there is the possibility that cosmic defects will produce a spectrum of primordial adiabatic density perturbations, when the speed characterizing the defect-producing scalar field is much larger than the speed characterizing gravity and standard model particles. This model will exactly mimic the standard predictions of inflationary models, with the exception of a small non-Gaussian signal which could be detected by future experiments.

Received 22 February 2000

DOI:https://doi.org/10.1103/PhysRevLett.85.1370

Authors & Affiliations

P. P. Avelino^1,2,* and C. J. A. P. Martins^3,†

¹Centro de Astrofísica, Universidade do Porto, Rua das Estrelas s/n, 4150-762 Porto, Portugal
²Departamento de Física da Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
³Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, United Kingdom

^*Electronic address: pedro@astro.up.pt
^†Also at C.A.U.P., Rua das Estrelas s/n, 4150 Porto, Portugal.Electronic address: C.J.A.P.Martins@damtp.cam.ac.uk