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Distinguishing GR and f(R) gravity with the gravitational lensing Minkowski functionals.

Ling, C. and Wang, Q. and Li, R. and Li, B. and Wang, J. and Gao, L. (2015) 'Distinguishing GR and f(R) gravity with the gravitational lensing Minkowski functionals.', Physical review D., 92 (6). 064024.


We explore the Minkowski functionals (MFs) of weak lensing convergence map to distinguish between f(R) gravity and the general relativity (GR). The mock weak lensing convergence maps are constructed with a set of high-resolution simulations assuming different gravity models. It is shown that the lensing MFs of f(R) gravity can be considerably different from that of GR because of the environmentally dependent enhancement of structure formation. We also investigate the effect of lensing noise on our results, and find that it is likely to distinguish F5, F6, and GR gravity models with a galaxy survey of ∼3000  degree2 and with a background source number density of ng=30  arcmin−2, comparable to an upcoming survey dark energy survey (DES). We also find that the f(R) signal can be partially degenerate with the effect of changing cosmology, but combined use of other observations, such as the cosmic microwave background (CMB) data, can help break this degeneracy.

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Publisher statement:Reprinted with permission from the American Physical Society: Physical Review D 92, 064024 © 2015 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
Date accepted:04 August 2015
Date deposited:12 November 2015
Date of first online publication:September 2015
Date first made open access:No date available

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