Maximum-likelihood analysis of the COBE angular correlation function

Maximum-likelihood analysis of the COBE angular correlation function
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COBE角相关函数的最大似然分析

DOI:
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发表时间:
1993
期刊:
影响因子:
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通讯作者:
E. Bertschinger
E. Bertschinger
中科院分区:
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文献类型:
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作者:
U. Seljak;E. Bertschinger

文献摘要

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我们使用最大似然估计来确定 COBE DMR 数据重组时密度涨落功率谱的四极振幅 Q(sub rms-PS) 和谱指数 n。我们发现对于固定 n,Q(sub rms-PS) = (15.7 +/- 2.6) exp (0.46(1 - n)) microK 形式的两个参数之间存在很强的相关性。我们的结果略小于 Smoot 等人 1992 年的估计,并且具有更小的统计不确定性。
We have used maximum-likelihood estimation to determine the quadrupole amplitude Q(sub rms-PS) and the spectral index n of the density fluctuation power spectrum at recombination from the COBE DMR data. We find a strong correlation between the two parameters of the form Q(sub rms-PS) = (15.7 +/- 2.6) exp (0.46(1 - n)) microK for fixed n. Our result is slightly smaller than and has a smaller statistical uncertainty than the 1992 estimate of Smoot et al.