title: Constraining f(R) Gravity Theory Using Weak Lensing Peak Statistics from the Canada-France-Hawaii-Telescope Lensing Survey.
abstract: 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 the model parameter |f_{R0}| for n=1. The 95% C.L. is log_{10}|f_{R0}|<-4.82 given WMAP9 priors on (Ω_{m}, A_{s}). With Planck15 priors, the corresponding result is log_{10}|f_{R0}|<-5.16.
authors: Department of Astronomy, School of Physics, Peking University, Beijing 100871, People's Republic of China.
authors: Xiangkun
authors: X
authors: Liu
authors: Institute for Computational Cosmology, Department of Physics, Durham University, South Road, Durham DH1 3LE, United Kingdom.
authors: Baojiu
authors: B
authors: Li
authors: National Astronimical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China.|Institute of Cosmology & Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth PO1 3FX, United Kingdom.
authors: Gong-Bo
authors: GB
authors: Zhao
authors: The Shanghai Key Lab for Astrophysics, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, People's Republic of China.
authors: Mu-Chen
authors: MC
authors: Chiu
authors: The Shanghai Key Lab for Astrophysics, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, People's Republic of China.|Department of Physics, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, People's Republic of China.
authors: Wei
authors: W
authors: Fang
authors: Department of Astronomy, School of Physics, Peking University, Beijing 100871, People's Republic of China.
authors: Chuzhong
authors: C
authors: Pan
authors: Key Laboratory for Computational Astrophysics, The Partner Group of Max Planck Institute for Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China.
authors: Qiao
authors: Q
authors: Wang
authors: National Astronimical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China.
authors: Wei
authors: W
authors: Du
authors: Department of Astronomy, School of Physics, Peking University, Beijing 100871, People's Republic of China.
authors: Shuo
authors: S
authors: Yuan
authors: The Shanghai Key Lab for Astrophysics, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, People's Republic of China.
authors: Liping
authors: L
authors: Fu
authors: Department of Astronomy, School of Physics, Peking University, Beijing 100871, People's Republic of China.|Collaborative Innovation Center of Modern Astronomy and Space Exploration, Nanjing 210093, People's Republic of China.
authors: Zuhui
authors: Z
authors: Fan