摘要
We consider a new cosmological model(calledΛCDM),in which the vacuum energy interacts with matter and radiation,and test this model using the current cosmological observations.Using the CMB+BAO+SN(CBS)dataset to constrain the model,we find that H_(0) and S_(8) tensions are relieved to 2.87σand 2.77σ,respectively.However,in this case,theΛCDM model is not favored by the data,compared withΛCDM.We find that when the H_(0) and S_(8) data are added to the data combination,the situation is significantly improved.In the CBS+H_(0) case,the model relieves the H_(0) tension to 0.47σ,and the model is favored overΛCDM.In the CBS+H_(0)+S_(8) case,we obtain a synthetically best situation,in which the H_(0) and S_(8) tensions are relieved to 0.72σand 2.11σ,respectively.In this case,the model is most favored by the data.Therefore,this cosmological model can greatly relieve the H_(0) tension and simultaneously effectively alleviate the S_(8) tension.
作者
高立场
薛社生
张鑫
Li-Yang Gao;She-Sheng Xue;Xin Zhang(Key Laboratory of Cosmology and Astrophysics(Liaoning Province)&Department of Physics,College of Sciences,Northeastern University,Shenyang 110819,China;Kapteyn Astronomical Institute,University of Groningen,P.O.Box 800,9700 AV Groningen,the Netherlands;ICRANet,Piazzale della Repubblica,10-65122,Pescara,Italy;ICTP-AP,University of Chinese Academy of Sciences,Beijing 100049,China;Physics Department,Sapienza University of Rome,P.le A.Moro 5,00185,Rome,Italy;INFN,Sezione di Perugia,Via A.Pascoli,I-06123,Perugia,Italy;Key Laboratory of Data Analytics and Optimization for Smart Industry(Ministry of Education),Northeastern University,Shenyang 110819,China;National Frontiers Science Center for Industrial Intelligence and Systems Optimization,Northeastern University,Shenyang 110819,China)
基金
Supported by the National SKA Program of China(2022SKA0110200,2022SKA0110203)
the National Natural Science Foundation of China(11975072,11875102,11835009)。
