整体拟合测定宇宙学参数

Determining cosmological parameters with global fitting analysis

整体拟合分析对于精确测量宇宙学参数非常重要.本文讨论了微波背景光子(CMB)温度功率谱,大尺度巡天观测及超新星观测对于暗能量状态方程参数的限制,通过比较利用的温度功率谱和CMB简化信息对于暗能量状态方程参数的限制,讨论了整体拟合的重要性.

With the accumulation of astronomical observational data,the global fitting analysis becomes more and more important for determining cosmological parameters. In this paper,we study the effectiveness of the usage of these distance information and show that these compressed CMB information can give similar constraints on dark energy parameters compared with the full CMB power spectrum if dark energy perturbations are included,however,once incorrectly neglecting the dark energy perturbations,the difference of the results are sizable.