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

Ling, C.; Wang, Q.; Li, R.; Li, B.; Wang, J.; Gao, L.

doi:10.1103/physrevd.92.064024

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

Ling, C.; Wang, Q.; Li, R.; Li, B.; Wang, J.; Gao, L.

Authors

C. Ling

Q. Wang

Professor Baojiu Li baojiu.li@durham.ac.uk
Professor

J. Wang

L. Gao

Abstract

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.

Citation

Ling, C., Wang, Q., Li, R., Li, B., Wang, J., & Gao, L. (2015). Distinguishing GR and f(R) gravity with the gravitational lensing Minkowski functionals. Physical Review D, 92(6), Article 064024. https://doi.org/10.1103/physrevd.92.064024

Journal Article Type	Article
Acceptance Date	Aug 4, 2015
Publication Date	Sep 17, 2015
Deposit Date	Aug 17, 2015
Publicly Available Date	Nov 12, 2015
Journal	Physical Review D
Print ISSN	1550-7998
Electronic ISSN	1550-2368
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	92
Issue	6
Article Number	064024
DOI	https://doi.org/10.1103/physrevd.92.064024
Related Public URLs	http://arxiv.org/abs/1410.2734

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