Abstract
The Hubble tension persists as a challenge in cosmology.Even early dark energy(EDE)models,initially considered the most promising for alleviating the Hubble tension,fall short of addressing the issue without exacerbating other tensions,such as the S8 tension.Considering that a negative dark matter(DM)equation of state(EoS)parameter is conducive to reduce the value of the σ8 parameter,we extend the axion-like EDE model in this paper by replacing the cold dark matter(CDM)with DM characterized by a constant EoS wdm(referred to as WDM hereafter).We then impose constraints on this axion-like EDE extension model,along with three other models:the axion-like EDE model,AWDM,and ACDM.These constraints are derived from a comprehensive analysis incorporating data from the Planck 2018 cosmic microwave background,baryon acoustic oscillations,and the Pantheon compilation,as well as a prior on H0(i.e.H0=73.04±1.04,based on the latest local measurement by Riess et al)and a Gaussianized prior on S8(i.e.S8=0.766±0.017,determined through the joint analysis of KID1000+BOSS+2dLenS).We find that although the new model maintains the ability to alleviate the Hubble tension to～1.4σ,it still exacerbates the S8 tension to a level similar to that of the axion-like EDE model.
基金项目
National Key R&D Program of China(2020YFC2201600)
National Natural Science Foundation of China(NSFC)(12 073 088)
National SKA Program of China(2020SKA0110402)
NETL
NSTL
万方数据