首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Constraints on Non-Flat Starobinsky f(R) Dark Energy Model
Authors:Chao-Qiang Geng  Yan-Ting Hsu  Jhih-Rong Lu
Institution:1.School of Science, Chongqing University of Posts & Telecommunications, Chongqing 400065, China;2.Department of Physics, National Tsing Hua University, Hsinchu 300, Taiwan; (Y.-T.H.); (J.-R.L.);3.Synergetic Innovation Center for Quantum Effects and Applications (SICQEA), Hunan Normal University, Changsha 410081, China
Abstract:We study the viable Starobinsky f(R) dark energy model in spatially non-flat FLRW backgrounds, where f(R)=RλRch1(1+R2/Rch2)1] with Rch and λ representing the characteristic curvature scale and model parameter, respectively. We modify CAMB and CosmoMC packages with the recent observational data to constrain Starobinsky f(R) gravity and the density parameter of curvature ΩK. In particular, we find the model and density parameters to be λ1<0.283 at 68% C.L. and ΩK=0.000990.0042+0.0044 at 95% C.L., respectively. The best χ2 fitting result shows that χf(R)2χΛCDM2, indicating that the viable f(R) gravity model is consistent with ΛCDM when ΩK is set as a free parameter. We also evaluate the values of AIC, BIC and DIC for the best fitting results of f(R) and ΛCDM models in the non-flat universe.
Keywords:modified gravitational theory  non-flat spacetime
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号