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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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.
|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.|
|Subject Keywords:||cosmic background radiation; gravitational lenses; spectral analysis|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Archive Administrator|
|Deposited On:||20 Oct 2006|
|Last Modified:||26 Dec 2012 09:13|
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