摘要
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.
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.
基金
supported by the National Natural Science Foundation of China(Grant Nos.10935013,11175093,11222545 and 11075083)
Zhejiang Provincial Natural Science Foundation of China(Grant Nos.Z6100077 and R6110518)
the National Basic Research Program of China(Grant No.2010CB832803)
the Program for Changjiang Scholars and Innovative Research Team in University(Grant No.IRT0964)
the Hunan Provincial Natural Science Foundation of China(Grant No.11JJ7001)
the Program for the Key Discipline in Hunan Province
