Published November 28, 2003
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Journal Article
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Can Cosmic Shear Shed Light on Low Cosmic Microwave Background Multipoles?
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.
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.Attached Files
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Additional details
- Eprint ID
- 5504
- Resolver ID
- CaltechAUTHORS:KESprl03
- NAG5-11985
- NASA
- DE-FG03-92-ER40701
- Department of Energy (DOE)
- NSF
- Created
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2006-10-20Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field
- Caltech groups
- TAPIR