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Phys. Rev. D 61, 123504 (2000) [9 pages]

Topological defects and cosmic microwave background anisotropies: Are the predictions reliable ?

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Alain Riazuelo*
Département d’Astrophysique Relativiste et de Cosmologie, UMR 8629 du CNRS, Observatoire de Paris, 5 place J. Janssen, 92195 Meudon, France

Nathalie Deruelle†
Département d’Astrophysique Relativiste et de Cosmologie, UMR 8629 du CNRS, Observatoire de Paris, 5 place J. Janssen, 92195 Meudon, France,
Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Silver Street, Cambridge, CB3 9EW, England,
Institut des Hautes Etudes Scientifiques, 91140 Bures-sur-Yvette, France

Patrick Peter‡
Département d’Astrophysique Relativiste et de Cosmologie, UMR 8629 du CNRS, Observatoire de Paris, 5 place J. Janssen, 92195 Meudon, France
Institut d’Astrophysique de Paris, UPR 341 du CNRS, 98 bis boulevard Arago, 75014 Paris, France

Received 9 November 1999; published 5 May 2000

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 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.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.61.123504
DOI:
10.1103/PhysRevD.61.123504
PACS:
98.80.Cq, 98.70.Vc

*Email address: Alain.Riazuelo@obspm.fr

†Email address: Nathalie.Deruelle@obspm.fr

‡Email address: Patrick.Peter@obspm.fr

 
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