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
- Published Version
See Usage Policy.
Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:ERIprd08
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.
|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|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Archive Administrator|
|Deposited On:||03 Nov 2008 22:50|
|Last Modified:||11 Dec 2016 00:51|
Repository Staff Only: item control page