A Measurement of the Angular Power Spectrum of the Anisotropy in the Cosmic Microwave Background
A Measurement of the Angular Power Spectrum of the Anisotropy in the Cosmic Microwave Background
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宇宙微波背景下各向异性角功率谱的测量
DOI：
10.1086/303438
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Edward J. Wollack
中科院分区：
文献类型：
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作者：
C. Netterfield;M. Devlin;N. Jarosik;L. Page;Edward J. Wollack
本文报道了宇宙微波背景辐射各向异性角功率谱的测量结果。在l = 54（θ 3°）~ l = 404（θ 0.°45）的23个不同的多极子波段和26 ~ 46 GHz的6个频段上，在三个观测季节中测量了各向异性。这些测量每年都是一致的。波动的频谱指数（在低l测量）是一致的CMB和不一致的尘埃或银河系的自由-自由发射。此外，重复并证实了MSAM 1 -92实验（Cheng等人，1994）的观察结果。角谱从δ T1 <$[l（2l+1）<$]明显上升|AML| 2 π/4π]1/2=49+ 8−5 μK（l = 87），δTl=85+ 10−8 μK（l = 237）。这些值不包括总体±14%（1 σ）校准不确定度。分析和可能的系统误差进行了讨论。
We report on a measurement of the angular power spectrum of the anisotropy in the cosmic microwave background (CMB). The anisotropy is measured in 23 different multipole bands from l = 54 (≈ 3°) to l = 404 (≈ 0.°45) and in six frequency bands from 26 to 46 GHz over three observing seasons. The measurements are consistent from year to year. The frequency spectral index of the fluctuations (measured at low l) is consistent with that of the CMB and inconsistent with either dust or Galactic free-free emission. Furthermore, the observations of the MSAM1-92 experiment (Cheng et al. 1994) are repeated and confirmed. The angular spectrum shows a distinct rise from δTl ≡ [l(2l+1)⟨| aml |2⟩/4π]1/2=49+ 8−5 μK at l = 87 to δTl=85+ 10−8 μK at l = 237. These values do not include an overall ±14% (1 σ) calibration uncertainty. The analysis and possible systematic errors are discussed.