Constrainingf(R)Gravity Theory Using Weak Lensing Peak Statistics from the Canada-France-Hawii-Telescope Lensing Survey

Xiangkun Liu, Baojiu Li, Gong-Bo Zhao, Mu-Chen Chiu, Wei Fang, Chuzhong Pan, Qiao Wang, Wei Du, Shuo Yuan, Liping Fu, Zuhui Fan
2016 Physical Review Letters  
In this Letter, we report the observational constraints on the Hu-Sawicki f(R) theory derived from weak lensing peak abundances, which are closely related to the mass function of massive halos. In comparison with studies using optical or x-ray clusters of galaxies, weak lensing peak analyses have the advantages of not relying on mass-baryonic observable calibrations. With observations from the Canada-France-Hawaii-Telescope Lensing Survey, our peak analyses give rise to a tight constraint on
more » ... model parameter |f_R0| for n=1. The 95% CL limit is _10|f_R0| < -4.82 given WMAP9 priors on (Ω_ m, A_ s). With Planck15 priors, the corresponding result is _10|f_R0| < -5.16.
doi:10.1103/physrevlett.117.051101 pmid:27517761 fatcat:avk7kfthirfzdbfoqydszmdu5u