A SEARCH FOR COSMIC MICROWAVE BACKGROUND ANISOTROPIES ON ARCMINUTE SCALES WITH BOLOCAM
A SEARCH FOR COSMIC MICROWAVE BACKGROUND ANISOTROPIES ON ARCMINUTE SCALES WITH BOLOCAM
复制标题
用 BOLOCAM 搜索弧分尺度上的宇宙微波背景各向异性
DOI：
10.1088/0004-637x/690/2/1597
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
H. Nguyen
中科院分区：
文献类型：
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作者：
J. Sayers;S. Golwala;P. Rossinot;P. Ade;J. Aguirre;J. Aguirre;J. Bock;S. Edgington;J. Glenn;A. Goldin;D. Haig;A. Lange;G. Laurent;P. Mauskopf;H. Nguyen
我们已经调查了两个科学领域共1 deg 2与Bolocam在2.1毫米，以寻找次级宇宙微波背景（CMB）的各向异性所造成的Sunyaev-Zel'dovich效应（SZE）。这些字段位于Lynx和Subaru/XMM SDS 1字段中。我们的调查是敏感的角度尺度与有效的角多极子的FWHM = 5700，FWHM = 2800，并有一个角分辨率为60 arcsec的FWHM。我们的数据没有提供各向异性的证据。我们能够限制总天文各向异性的水平，建模为平带功率，最常见的68%，90%和95%CL上限为590，760和830 μ K2 CMB。我们统计减去已知的贡献，从主CMB各向异性，包括宇宙方差，以获得对SZE各向异性贡献的约束。现在，包括通量校准不确定性，我们在平带功率上最常见的68%、90%和95% CL上限为690、960和1000 μ K2 CMB。当我们采用Komatsu和Seljack在2002年提出的分析谱，并考虑SZE各向异性信号的非高斯性时，我们得到了由我们的传递函数790、1060和1080 μ K2 CMB加权的谱的平均振幅的上限。我们得到了σ8的90%CL上限，它归一化了密度涨落的功率谱，为1.57。这些是在150 GHz附近的频率下，在这些角度尺度下对来自调查数据的各向异性和σ8的第一个约束。
We have surveyed two science fields totaling 1 deg2 with Bolocam at 2.1 mm to search for secondary Cosmic Microwave Background (CMB) anisotropies caused by the Sunyaev-Zel'dovich effect (SZE). The fields are in the Lynx and Subaru/XMM SDS1 fields. Our survey is sensitive to angular scales with an effective angular multipole of ℓeff = 5700 with FWHMℓ = 2800 and has an angular resolution of 60 arcsec FWHM. Our data provide no evidence for anisotropy. We are able to constrain the level of total astronomical anisotropy, modeled as a flat-band power in , with most frequent 68%, 90%, and 95% CL upper limits of 590, 760, and 830 μK2CMB. We statistically subtract the known contribution from primary CMB anisotropy, including cosmic variance, to obtain constraints on the SZE anisotropy contribution. Now including flux calibration uncertainty, our most frequent 68%, 90%, and 95% CL upper limits on a flat-band power in are 690, 960, and 1000 μK2CMB. When we instead employ the analytical spectrum suggested by Komatsu and Seljack in 2002, and account for the non-Gaussianity of the SZE anisotropy signal, we obtain upper limits on the average amplitude of their spectrum weighted by our transfer function of 790, 1060, and 1080 μK2CMB. We obtain a 90% CL upper limit on σ8, which normalizes the power spectrum of density fluctuations, of 1.57. These are the first constraints on anisotropy and σ8 from survey data at these angular scales at frequencies near 150 GHz.