文献类型：期刊文献

英文题名：The time delay in strong gravitational lensing with Gauss-Bonnet correction

作者：Man, Jingyun[1,3];Cheng, Hongbo[1,2,3]

机构：[1]E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[2]Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA;[3]Shanghai Key Lab Astrophys, Shanghai 200234, Peoples R China

年份：2014

期号：11

外文期刊名：JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000346105300026)】；

基金：This Woik is supported by NSFC No. 10875043 and is partly supported by the Shanghai Research Foundation No. 07dz22020.

语种：英文

外文关键词：modified gravity; gravitational lensing; gravity

摘要：The time delay between two relativistic images in the strong gravitational lensing governed by Gauss-Bonnet gravity is studied. We make a complete analytical derivation of the expression of time delay in presence of Gauss-Bonnet coupling. With respect to Schwarzschild, the time delay decreases as a consequence of the shrinking of the photon sphere. As the coupling increases, the second term in the time delay expansion becomes more relevant. Thus time delay in strong limit encodes some new information about geometry in five-dimensional spacetime with Gauss-Bonnet correction.