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Superhorizon perturbations and the cosmic microwave background

Erickcek, Adrienne L. and Carroll, Sean M. and Kamionkowski, Marc (2008) Superhorizon perturbations and the cosmic microwave background. Physical Review D, 78 (8). Art. No. 083012. ISSN 2470-0010.

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Superhorizon perturbations induce large-scale temperature anisotropies in the cosmic microwave background (CMB) via the Grishchuk-Zel'dovich effect. We analyze the CMB temperature anisotropies generated by a single-mode adiabatic superhorizon perturbation. We show that an adiabatic superhorizon perturbation in a LambdaCDM universe does not generate a CMB temperature dipole, and we derive constraints to the amplitude and wavelength of a superhorizon potential perturbation from measurements of the CMB quadrupole and octupole. We also consider constraints to a superhorizon fluctuation in the curvaton field, which was recently proposed as a source of the hemispherical power asymmetry in the CMB.

Item Type:Article
Related URLs:
URLURL TypeDescription
Carroll, Sean M.0000-0002-4226-5758
Kamionkowski, Marc0000-0001-7018-2055
Additional Information:© 2008 The American Physical Society. (Received 11 August 2008; published 30 October 2008) We thank Chris Hirata and Mike Kesden for useful discussions. This work was supported by DOE DE-FG03-92-ER40701 and the Gordon and Betty Moore Foundation
Group:TAPIR, Moore Center for Theoretical Cosmology and Physics
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG03-92-ER40701
Gordon and Betty Moore FoundationUNSPECIFIED
Issue or Number:8
Record Number:CaltechAUTHORS:ERIprd08
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:12280
Deposited By: Archive Administrator
Deposited On:03 Nov 2008 22:50
Last Modified:03 Oct 2019 00:27

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