首页> 外文期刊>The Astrophysical journal >MAXIMA-l: A MEASUREMENT OF THE COSMIC MICROWAVE BACKGROUND ANISOTROPY ON ANGULAR SCALES OF l0'-5 deg.
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MAXIMA-l: A MEASUREMENT OF THE COSMIC MICROWAVE BACKGROUND ANISOTROPY ON ANGULAR SCALES OF l0'-5 deg.

机译:最大值-1:在l0'-5度角尺度上的宇宙微波背景各向异性的测量。

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摘要

We present a map and an angular power spectrum of the anisotropy of the cosmic microwave background (CMB) from the first flight of the Millimeterwave Anisotropy Experiment Imaging Array (MAXIMA). MAXIMA is a balloon-borne experiment with an array of l6 bolometric photometers operated at l00 mK. MAXIMA observed a l24 deg' region of the sky with l0' resolution at frequencies of l50, 240, and 4l0 GHz. The data were calibrated using in-flight measurements of the CMB dipole anisotropy. A map of the CMB anisotropy was produced from three l50 and one 240 GHz photometer without need for foreground subtractions. Analysis of this CMB map yields a power spectrum for the CMB anisotropy over the range 36 ≤ l ≤785. The spectrum shows a peak with an amplitude of 78 ± 6 μK at l = 220 and an amplitude varying between ~40 and ~50 μK for 400 ≤ l ≤ 785.
机译:我们从毫米波各向异性实验成像阵列(MAXIMA)的第一次飞行中呈现了宇宙微波背景(CMB)各向异性的图和角功率谱。 MAXIMA是一个气球实验,其中包含一系列在100 mK下运行的16台测辐射热计。 MAXIMA在150、240和410 GHz的频率下观察到天空的24度区域,分辨率为10度。使用飞行中CMB偶极各向异性的测量来校准数据。使用三个150和一个240 GHz光度计生成了CMB各向异性图,无需进行前景扣除。通过对该CMB映射进行分析,可以得出CMB各向异性在36≤l≤785范围内的功率谱。光谱显示一个峰值,在l = 220时振幅为78±6μK,对于400≤l≤785,振幅在〜40和〜50μK之间变化。

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