Scientific article
Open access

Cosmic microwave background anisotropies from scaling seeds : global defect models

Published inPhysical review. D. Particles and fields, vol. 59, no. 123005, 26
Publication date1999

We investigate the global texture model of structure formation in cosmogonies with a nonzero cosmological constant for different values of the Hubble parameter. We find that the absence of significant acoustic peaks and little power on large scales are robust predictions of these models. However, from a careful comparison with data we conclude that at present we cannot safely reject the model on the grounds of present CMB data. Exclusion by means of galaxy correlation data requires assumptions on biasing and statistics. New, very stringent constraints come from peculiar velocities. Investigating the large-N limit, we argue that our main conclusions apply to all global O(N) models of structure formation.

Citation (ISO format)
DURRER, Ruth, KUNZ, Martin, MELCHIORRI, Alessandro. Cosmic microwave background anisotropies from scaling seeds : global defect models. In: Physical review. D. Particles and fields, 1999, vol. 59, n° 123005, p. 26. doi: 10.1103/PhysRevD.59.123005
Main files (1)
Article (Accepted version)
ISSN of the journal0556-2821

Technical informations

Creation02/26/2009 4:59:49 PM
First validation02/26/2009 4:59:49 PM
Update time03/14/2023 3:01:17 PM
Status update03/14/2023 3:01:17 PM
Last indexation05/02/2024 11:05:10 AM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack