High-Resolution Observations of the Cosmic Microwave Background Power Spectrum with ACBAR
High-Resolution Observations of the Cosmic Microwave Background Power Spectrum with ACBAR
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DOI：
10.1086/379783
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发表时间：
2002-12
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影响因子：
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通讯作者：
C. Kuo;P. Ade;J. Bock;C. Cantalupo;M. Daub;J. Goldstein;W. Holzapfel;A. Lange;M. Lueker;M. Newcomb;J. Peterson;J. Ruhl;M. Runyan;E. T. U. Berkeley;Cardiff;Jpl;Lbnl;Cwru;Ucsb;Caltech;Cmu
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文献类型：
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作者：
C. Kuo;P. Ade;J. Bock;C. Cantalupo;M. Daub;J. Goldstein;W. Holzapfel;A. Lange;M. Lueker;M. Newcomb;J. Peterson;J. Ruhl;M. Runyan;E. T. U. Berkeley;Cardiff;Jpl;Lbnl;Cwru;Ucsb;Caltech;Cmu
本文报道了利用弧分钟宇宙学测辐射热计阵列接收机（ACBAR）首次测量宇宙微波背景辐射各向异性的结果。该仪器于2001年1月安装在南极的2.1米Viper望远镜上;这里提供的数据是截至2002年7月（含该月）的观测结果。我们提出了两个深差分地图减去领先和尾随观测的主要领域。差分图覆盖了大约24度2的天空，选择了低尘埃对比度。这些结果代表了迄今为止CMB各向异性的最高信噪比观测结果;在最深的150 GHz频带图中，我们达到了每5 '波束约8.0 μ K的rms。3 °范围的图和实验的小光束尺寸允许在l = 150 - 3000的范围内测量CMB各向异性功率谱，分辨率为Δ l = 150。星系尘埃和射电源的贡献所观察到的各向异性是可以忽略不计的，并删除在分析中。由此产生的功率谱被发现是一致的主要各向异性预期在一个和谐的Λ CDM宇宙。
We report the first measurements of anisotropy in the cosmic microwave background (CMB) radiation with the Arcminute Cosmology Bolometer Array Receiver (ACBAR). The instrument was installed on the 2.1 m Viper telescope at the South Pole in 2001 January; the data presented here are the product of observations up to and including 2002 July. We present two deep differential maps produced by subtracting leading and trailing observations from the main field. The differential maps cover approximately 24 deg2 of sky selected for low dust contrast. These results represent the highest signal-to-noise ratio observations of CMB anisotropy to date; in the deepest 150 GHz band map, we reached an rms of ~8.0 μK per 5' beam. The 3° extent of the maps and small beam size of the experiment allow the measurement of the CMB anisotropy power spectrum over the range l = 150-3000 with resolution of Δl = 150. The contributions of galactic dust and radio sources to the observed anisotropy are negligible and are removed in the analysis. The resulting power spectrum is found to be consistent with the primary anisotropy expected in a concordance ΛCDM universe.