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English

On the relation between the isotropy of the CMB and the geometry of the universe

Contributors

Rasanen, Syksy

Published in

Physical review. D. Particles, fields, gravitation, and cosmology, vol. 79, no. 123522, 5

Publication date

2009

Abstract

The near-isotropy of the cosmic microwave background (CMB) is considered to be the strongest indication for the homogeneity and isotropy of the universe, a cornerstone of most cosmological analysis. We derive new theorems which extend the Ehlers-Geren-Sachs result that an isotropic CMB implies that the universe is either stationary or homogeneous and isotropic, and its generalisation to the almost isotropic case. We discuss why the theorems do not apply to the real universe, and why the CMB observations do not imply that the universe would be nearly homogeneous and isotropic.

UNIGE affiliation entities

Citation (ISO format)

RASANEN, Syksy. On the relation between the isotropy of the CMB and the geometry of the universe. In: Physical review. D. Particles, fields, gravitation, and cosmology, 2009, vol. 79, n° 123522, p. 5. doi: 10.1103/PhysRevD.79.123522

Main files (1)

Article (Accepted version)

Identifiers

Journal ISSN

1550-2368
626views
1190downloads

Technical informations

Creation

10/07/2009 12:09:00

First validation

10/07/2009 12:09:00

Update

14/03/2023 15:09:35

Status update

14/03/2023 15:09:35

Last indexation

29/10/2024 11:48:26
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