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CMB lensing constraints on dark energy and modified gravity scenarios

Title
CMB lensing constraints on dark energy and modified gravity scenarios
Authors
Calabrese E.Cooray A.Martinelli M.Melchiorri A.Pagano L.Slosar A.Smoot G.F.
Ewha Authors
George F. Smoot
Issue Date
2009
Journal Title
Physical Review D - Particles, Fields, Gravitation and Cosmology
ISSN
1550-7998JCR Link
Citation
vol. 80, no. 10
Indexed
SCI; SCIE; SCOPUS WOS scopus
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. © 2009 The American Physical Society.
DOI
10.1103/PhysRevD.80.103516
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자연과학대학 > 물리학전공 > Journal papers
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