CaltechAUTHORS
  A Caltech Library Service

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 0556-2821. http://resolver.caltech.edu/CaltechAUTHORS:ERIprd08

[img]
Preview
PDF - Published Version
See Usage Policy.

377Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:ERIprd08

Abstract

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
http://dx.doi.org/10.1103/PhysRevD.78.083012DOIUNSPECIFIED
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
Funders:
Funding AgencyGrant Number
Department of EnergyDE-FG03-92-ER40701
Gordon and Betty Moore FoundationUNSPECIFIED
Record Number:CaltechAUTHORS:ERIprd08
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:ERIprd08
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:12280
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:03 Nov 2008 22:50
Last Modified:26 Dec 2012 10:29

Repository Staff Only: item control page