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arXiv 1408.3161astro-ph.CO
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根据2500平方度SPT-SZ巡天测量次级宇宙微波背景各向异性

A measurement of secondary cosmic microwave background anisotropies from the 2500-square-degree SPT-SZ survey

E. M. George, C. L. Reichardt, K. A. Aird, B. A. Benson, L. E. Bleem, J. E. Carlstrom, C. L. Chang, H-M. Cho, T. M. Crawford, A. T. Crites, T. de Haan, M. A. Do… 展开作者

E. M. George, C. L. Reichardt, K. A. Aird, B. A. Benson, L. E. Bleem, J. E. Carlstrom, C. L. Chang, H-M. Cho, T. M. Crawford, A. T. Crites, T. de Haan, M. A. Dobbs, J. Dudley, N. W. Halverson, N. L. Harrington, G. P. Holder, W. L. Holzapfel, Z. Hou, J. D. Hrubes, R. Keisler, L. Knox, A. T. Lee, E. M. Leitch, M. Lueker, D. Luong-Van, J. J. McMahon, J. Mehl, S. S. Meyer, M. Millea, L. M. Mocanu, J. J. Mohr, T. E. Montroy, S. Padin, T. Plagge, C. Pryke, J. E. Ruhl, K. K. Schaffer, L. Shaw, E. Shirokoff, H. G. Spieler, Z. Staniszewski, A. A. Stark, K. T. Story, A. van Engelen, K. Vanderlinde, J. D. Vieira, R. Williamson, O. Zahn

摘要:

我们目前的测量次级宇宙微波背景(CMB)各向异性和宇宙红外背景(CIB)波动使用的数据从南极望远镜(SPT)覆盖完整的2540平方。SPT-SZ测区。在中心频率为95、150和220 GHz的三个SPT-SZ频带中的数据用于产生覆盖多极范围2000 < ell < 11000(角标度5' > θ> 1')的六个角功率谱(三个单频自谱和三个互谱)。这些是在这些频率下在ε 11> 2500处的角功率谱的最精确测量。在这些角尺度和频率的功率谱的主要贡献者是主CMB,CIB,热和运动学Sunyaev-Zel'dovich效应(tSZ和kSZ),和射电星系。我们包括对来自800平方°的tSZ双谱的测量的tSZ功率的约束。在SPT-SZ调查中。我们在143 GHz处测得tSZ功率为DtSZ = 4.08 + 0.58 - 0.67 μK^2,kSZ功率为DkSZ = 2.9 +- 1.3 μK^2。在98.1% CL下,数据更倾向于正kSZ功率。我们测量了tSZ和CIB功率源之间的相关系数ε = 0.113 + 0.057 - 0.054,在99.0%的置信水平下ε < 0不受欢迎。对kSZ功率的约束可以解释为再电离持续时间的上限。当考虑到再电离后的均匀kSZ信号时,我们发现在95%CL下持续时间Δz < 5.4的上限。

英文摘要:

We present measurements of secondary cosmic microwave background (CMB) anisotropies and cosmic infrared background (CIB) fluctuations using data from the South Pole Telescope (SPT) covering the complete 2540 sq.deg. SPT-SZ survey area. Data in the three SPT-SZ frequency bands centered at 95, 150, and 220 GHz, are used to produce six angular power spectra (three single-frequency auto-spectra and three cross-spectra) covering the multipole range 2000 < ell < 11000 (angular scales 5' > θ> 1'). These are the most precise measurements of the angular power spectra at ell > 2500 at these frequencies. The main contributors to the power spectra at these angular scales and frequencies are the primary CMB, CIB, thermal and kinematic Sunyaev-Zel'dovich effects (tSZ and kSZ), and radio galaxies. We include a constraint on the tSZ power from a measurement of the tSZ bispectrum from 800 sq.deg. of the SPT-SZ survey. We measure the tSZ power at 143 GHz to be DtSZ = 4.08 +0.58 -0.67 μK^2 and the kSZ power to be DkSZ = 2.9 +- 1.3 μK^2. The data prefer positive kSZ power at 98.1% CL. We measure a correlation coefficient of ξ= 0.113 +0.057 -0.054 between sources of tSZ and CIB power, with ξ< 0 disfavored at a confidence level of 99.0%. The constraint on kSZ power can be interpreted as an upper limit on the duration of reionization. When the post-reionization homogeneous kSZ signal is accounted for, we find an upper limit on the duration Δz < 5.4 at 95% CL.

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