Maximum-likelihood estimation of the cosmic microwave background power spectrum from interferometer observations
Maximum-likelihood estimation of the cosmic microwave background power spectrum from interferometer observations
复制标题
根据干涉仪观测对宇宙微波背景功率谱进行最大似然估计
DOI：
10.1046/j.1365-8711.2002.05524.x
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发表时间：
2002
影响因子：
4.8
通讯作者：
K. Maisinger
中科院分区：
文献类型：
--
作者：
M.P.Hobson;K. Maisinger
本文提出了一种利用干涉仪观测估算宇宙微波背景辐射各向异性功率谱的极大似然方法。该方法计算平坦的带功率估计在单独的箱在l空间中，连同在每个箱的功率的置信区间。对于多频数据，也可以恢复其他前景分量的功率谱。利用干涉仪数据的几个特性，它们一起允许似然函数的快速计算。该方法适用于单场或镶嵌观测，并可适当考虑非共面基线。该方法说明了应用程序的模拟数据从非常小的阵列。
A maximum-likelihood method is presented for estimating the power spectrum of anisotropies in the cosmic microwave background (CMB) from interferometer observations. The method calculates flat band-power estimates in separate bins in l-space, together with confidence intervals on the power in each bin. For multifrequency data, the power spectrum of the other foreground components may also be recovered. Advantage is taken of several characteristic properties of interferometer data, which together allow the fast calculation of the likelihood function. The method may be applied to single-field or mosaicked observations, and proper account can be taken of non-coplanar baselines. The method is illustrated by application to simulated data from the Very Small Array.