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Constrains on f(T) gravity with the strong gravitational lensing data
Authors:Juan Wu  ZhengXiang Li  PuXun Wu  HongWei Yu
Affiliation:1. Department of Physics and Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education, Hunan Normal University, Changsha, 410081, China
2. Center for Nonlinear Science and Department of Physics, Ningbo University, Ningbo, 315211, China
Abstract:Strong lensing is an effective way to probing the properties of dark energy. In this paper, we use the strong lensing data to constrain the f(T) theory, which is a new modified gravity to explain the present accelerating cosmic expansion without the need of dark energy. In our discussion, the CMB and BAO data are also added to constrain model parameters tightly and three different f(T) models are studied. We find that strong lensing has an important role on constraining f(T) models, and once the CMB+BAO data is added, a tighter constraint is obtained. However, the consistency of our result with what is obtained from SNIa+CMB+BAO is actually model-dependent.
Keywords:strong gravitational lensing  f(T) gravity  accelerated cosmic expansion
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