Running vacuum model in a non-flat universe  

作　　者：Chao-Qiang Geng Yan-Ting Hsu Lu Yin Kaituo Zhang 耿朝强;徐彦婷;尹璐;张开拓(School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced Study,UCAS,Hangzhou 310024;International Centre for Theoretical Physics Asia-Pacific,Beijing/Hangzhou;Department of Physics,National Tsing Hua University,Hsinchu,300;National Center for Theoretical Sciences,Hsinchu,300;Department of Physics,Anhui Normal University,Wuhu,Anhui 241000;Collaborative Innovation Center of Light Manipulations and Applications,Shandong Normal University,Jinan 250358)

机构地区：[1]School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced Study,UCAS,Hangzhou 310024 [2]International Centre for Theoretical Physics Asia-Pacific,Beijing/Hangzhou [3]Department of Physics,National Tsing Hua University,Hsinchu,300 [4]National Center for Theoretical Sciences,Hsinchu,300 [5]Department of Physics,Anhui Normal University,Wuhu,Anhui 241000 [6]Collaborative Innovation Center of Light Manipulations and Applications,Shandong Normal University,Jinan 250358

出　　处：《Chinese Physics C》2020年第10期178-184,共7页中国物理C（英文版）

基　　金：Supported in part by National Center for Theoretical Sciences,MoST(MoST-107-2119-M-007-013-MY3);National Natural Science Foundation of China(11505004,11447104);the Anhui Provincial Natural Science Foundation of China(1508085QA17)。

摘　　要：We investigate observational constraints on the running vacuum model(RVM)ofΛ=3v(H^2+K/a^2)+c0 in a spatially curved universe,where is the model parameter,K corresponds to the spatial curvature constant,represents the scalar factor,and co is a constant defined by the boundary conditions.We study the CMB power spectra with several sets of and K in the RVM.By fitting the cosmological data,we find that the best fitted x^2 value for RVM is slightly smaller than that of CDM in the non-flat universe,along with the constraints of v≤O(10^-4)(68%C.L.)and|ΩK=-K/(aH)^2|≤O(10^-2)(95%C.L.).In particular,our results favor the open universe in both CDM and RVM.In addition,we show that the cosmological constraints of∑mv=0.256^+0.224-0.234(RVM)and∑mv=0.257^+0.219-0.234(ΛCDM)at 95%C.L.for the neutrino mass sum are relaxed in both models in the spatially curved universe.

关 键 词：cosmological parameters from CMBR cosmological simulations dark energy theory 

分 类 号：P159[天文地球—天文学]