天体孵化年龄对利用天体年龄限制宇宙学参数研究的影响

Effect of incubation time on constraining cosmological parameters using looking back time

利用星系及星系团年龄与红移的关系限制宇宙学参数时,由于不同处理孵化年龄的方法会对限制平直标准宇宙学模型中宇宙物质密度参数Ωm产生不同影响,提出按照天体类型设定不同孵化年龄的处理方法,并应用该方法得到Ωm的取值约为0.27～0.37,最后将该方法应用到将天体年龄数据按计算哈勃参数分组的情况,所得对Ωm的限制结果与使用相应的哈勃参数得到的结果一致.

Because the way dealing with the incubation time of galaxies or clusters may influence the result of the matter density parameter Ωmin the flat standard cosmological model when using the relationship of galaxies or clusters age and red-shift to constrain the cosmological parameters, a new method which assign different incubation times to different groups was proposed. The value of Ωmis in the range of 0.27—0.37 using this method, and the constraining results are consistent with the results of that from the Hubble parameters when grouping the data according the criteria used in calculating Hubble parameters.