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CMB lensing constraints on dark energy and modified gravity scenarios

Calabrese, Erminia, Cooray, Asantha, Martinelli, Matteo, Melchiorri, Alessandro, Pagano, Luca, Slosar, An?e and Smoot, George F. 2009. CMB lensing constraints on dark energy and modified gravity scenarios. Physical Review D 80 (10) , 103516. 10.1103/PhysRevD.80.103516

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Abstract

Weak gravitational lensing leaves a characteristic imprint on the cosmic microwave background temperature and polarization angular power spectra. Here, we investigate the possible constraints on the integrated lensing potential from future cosmic microwave background angular spectra measurements expected from Planck and EPIC. We find that Planck and EPIC will constrain the amplitude of the integrated projected potential responsible for lensing at 6% and 1% level, respectively, with very little sensitivity to the shape of the lensing potential. We discuss the implications of such a measurement in constraining dark energy and modified gravity scalar-tensor theories. We then discuss the impact of a wrong assumption on the weak lensing potential amplitude on cosmological parameter inference.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: American Physical Society
ISSN: 1550-7998
Date of First Compliant Deposit: 10 October 2017
Date of Acceptance: 11 April 2009
Last Modified: 11 Oct 2017 12:13
URI: http://orca.cf.ac.uk/id/eprint/105357

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