北京师范大学学报（自然科学版）2017，Vol.53Issue(2)：144-150,7.DOI:10.16360/j.cnki.jbnuns.2017.02.005
哈勃参量限制宇宙的backreaction效应
Constraining backreaction effects with observational Hubble parameter data
摘要
Abstract
Interpretation of accelerated expansion of the universe within the framework of averaged inhomogeneous cosmology model is studied in the present work.Combining backreaction effects of dust cosmology model with template metric proposed by Larena et al.,it is concluded that FLRW metric canaccurately describe evolution of the early universe.But after red-shift of up to a(D)＞0.1,difference between FLRW metric and backreaction model becomes apparent.The cosmological parameters are then constrained with the effective Hubble parameter.Since the exact relation between red-shifts and scale factor is not obtained,one can approximately elect FLRW metric to replace template metric to constrain them.The constraint value Ωm=0.25-0.02-0.02 (1σstat) fits the results of other cosmological models.Cosmological parameters are analyzed using best-fit values.It is found that backreaction effects of the universe can satisfactorily interpret accelerated expansion,so this model is worthwhile for further exploration.关键词
暗能量/backreaction/哈勃参量Key words
dark energy/backreaction/Hubble parameter分类
天文与地球科学引用本文复制引用
曹树磊,杨英杰,张同杰..哈勃参量限制宇宙的backreaction效应[J].北京师范大学学报（自然科学版）,2017,53(2):144-150,7.基金项目
国家自然科学基金资助项目(11573006,11528306,10473002) （11573006,11528306,10473002）
科技部973资助项目(2012CB821804) （2012CB821804）
