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@article{Munshi:2016:04/056,
author = {Munshi, D and Hu, B and Matsubara, T and Coles, P and Heavens, A},
doi = {04/056},
journal = {Journal of Cosmology and Astroparticle Physics},
title = {Lensing-induced morphology changes in CMB temperature maps in modified gravity theories},
url = {http://dx.doi.org/10.1088/1475-7516/2016/04/056},
volume = {2016},
year = {2016}
}

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TY  - JOUR
AB  - Lensing of the Cosmic Microwave Background (CMB) changes the morphology of pattern of temperature fluctuations, so topological descriptors such as Minkowski Functionals can probe the gravity model responsible for the lensing. We show how the recently introduced two-to-two and three-to-one kurt-spectra (and their associated correlation functions), which depend on the power spectrum of the lensing potential, can be used to probe modified gravity theories such as f(R) theories of gravity and quintessence models. We also investigate models based on effective field theory, which include the constant-Ω model, and low-energy Hoava theories. Estimates of the cumulative signal-to-noise for detection of lensing-induced morphology changes, reaches Script O(103) for the future planned CMB polarization mission COrE+. Assuming foreground removal is possible to max=3000, we show that many modified gravity theories can be rejected with a high level of significance, making this technique comparable in power to galaxy weak lensing or redshift surveys. These topological estimators are also useful in distinguishing lensing from other scattering secondaries at the level of the four-point function or trispectrum. Examples include the kinetic Sunyaev-Zel'dovich (kSZ) effect which shares, with lensing, a lack of spectral distortion. We also discuss the complication of foreground contamination from unsubtracted point sources.
AU  - Munshi,D
AU  - Hu,B
AU  - Matsubara,T
AU  - Coles,P
AU  - Heavens,A
DO  - 04/056
PY  - 2016///
SN  - 1475-7516
TI  - Lensing-induced morphology changes in CMB temperature maps in modified gravity theories
T2  - Journal of Cosmology and Astroparticle Physics
UR  - http://dx.doi.org/10.1088/1475-7516/2016/04/056
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000393286400041&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/48293
VL  - 2016
ER  -

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