Parametrized modified gravity and the CMB bispectrum
Name
Di Valentino-2012-Parametrized modified gravity and the CMB bispectrum.pdf
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Author(s)
Silvestri, Alessandra
Valentino, Eleonora Di
Salvatelli, Valentina
Melchiorri, Alessandro
Date Issued
September 2012
Journal
Physical Review D
Publisher
American Physical Society
Citation
Di Valentino, Eleonora et al. “Parametrized Modified Gravity and the CMB Bispectrum.” Physical Review D 86.6 (2012). © 2012 American Physical Society
Version
Final published version
Abstract
We forecast the constraints on modified theories of gravity from the cosmic microwave background (CMB) anisotropies bispectrum that arises from correlations between lensing and the Integrated Sachs-Wolfe effect. In models of modified gravity the evolution of the metric potentials is generally altered and the contribution to the CMB bispectrum signal can differ significantly from the one expected in the standard cosmological model. We adopt a parametrized approach and focus on three different classes of models: Linder’s growth index, Chameleon-type models, and f(R) theories. We show that the constraints on the parameters of the models will significantly improve with future CMB bispectrum measurements.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevD.86.063517
