Kaluza-Klein anisotropy in the CMB

John D. Barrow; Roy Maartens

doi:10.1016/S0370-2693(02)01552-6

Kaluza-Klein anisotropy in the CMB

John D. Barrow^*, Roy Maartens

^*Corresponding author for this work

University of Cambridge

Research output: Contribution to journal › Article › peer-review

Abstract

We show that 5-dimensional Kaluza-Klein graviton stresses can slow the decay of shear anisotropy on the brane to observable levels, and we use cosmic microwave background anisotropies to place limits on the initial anisotropy induced by these stresses. An initial shear to Hubble distortion of only ∼ 10^-3 Ω₀h₀ ² at the 5D Planck time would allow the observed large-angle CMB signal to be a relic mainly of KK tidal effects.

Original language	English
Pages (from-to)	153-158
Number of pages	6
Journal	Physics Letters B
Volume	532
Issue number	3-4
DOIs	https://doi.org/10.1016/S0370-2693(02)01552-6
Publication status	Published - 25 Apr 2002

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title = "Kaluza-Klein anisotropy in the CMB",

abstract = "We show that 5-dimensional Kaluza-Klein graviton stresses can slow the decay of shear anisotropy on the brane to observable levels, and we use cosmic microwave background anisotropies to place limits on the initial anisotropy induced by these stresses. An initial shear to Hubble distortion of only ∼ 10-3 Ω0h0 2 at the 5D Planck time would allow the observed large-angle CMB signal to be a relic mainly of KK tidal effects.",

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AU - Maartens, Roy

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AB - We show that 5-dimensional Kaluza-Klein graviton stresses can slow the decay of shear anisotropy on the brane to observable levels, and we use cosmic microwave background anisotropies to place limits on the initial anisotropy induced by these stresses. An initial shear to Hubble distortion of only ∼ 10-3 Ω0h0 2 at the 5D Planck time would allow the observed large-angle CMB signal to be a relic mainly of KK tidal effects.

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DO - 10.1016/S0370-2693(02)01552-6

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VL - 532

SP - 153

EP - 158

JO - Physics Letters B

JF - Physics Letters B

IS - 3-4

ER -

Kaluza-Klein anisotropy in the CMB

Abstract

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