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Can Cosmic Shear Shed Light on Low Cosmic Microwave Background Multipoles?

Kesden, Michael and Kamionkowski, Marc and Cooray, Asantha (2003) Can Cosmic Shear Shed Light on Low Cosmic Microwave Background Multipoles? Physical Review Letters, 91 (22). Art. No. 221302. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:KESprl03

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Abstract

The lowest multipole moments of the cosmic microwave background (CMB) are smaller than expected for a scale-invariant power spectrum. One possible explanation is a cutoff in the primordial power spectrum below a comoving scale of kc~=5.0×10^–4 Mpc^–1. Such a cutoff would increase significantly the cross correlation between the large-angle CMB and cosmic-shear patterns. The cross correlation may be detectable at >2sigma which, combined with the low CMB moments, may tilt the balance between a 2sigma result and a firm detection of a large-scale power-spectrum cutoff. The cutoff also increases the large-angle cross correlation between the CMB and the low-redshift tracers of the mass distribution.


Item Type:Article
Additional Information:©2003 The American Physical Society (Received 27 June 2003; revised 27 August 2003; published 26 November 2003) This work was supported in part by NASA NAG5-11985 and DoE DE-FG03-92-ER40701. M.K. acknowledges the support of the NSF.
Group:TAPIR
Subject Keywords:cosmic background radiation; gravitational lenses; spectral analysis
Record Number:CaltechAUTHORS:KESprl03
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:KESprl03
Alternative URL:http://dx.doi.org/10.1103/PhysRevLett.91.221302
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5504
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:20 Oct 2006
Last Modified:18 Sep 2014 18:11

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