从SPT-SZ + SPTPOL调查中对次级宇宙微波背景各向异性的改进测量

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从SPT-SZ + SPTPOL调查中对次级宇宙微波背景各向异性的改进测量

An Improved Measurement of the Secondary Cosmic Microwave Background Anisotropies from the SPT-SZ + SPTpol Surveys

论文作者

Reichardt, C. L., Patil, S., Ade, P. A. R., Anderson, A. J., Austermann, J. E., Avva, J. S., Baxter, E., Beall, J. A., Bender, A. N., Benson, B. A., Bianchini, F., Bleem, L. E., Carlstrom, J. E., Chang, C. L., Chaubal, P., Chiang, H. C., Chou, T. L., Citron, R., Moran, C. Corbett, Crawford, T. M., Crites, A. T., de Haan, T., Dobbs, M. A., Everett, W., Gallicchio, J., George, E. M., Gilbert, A., Gupta, N., Halverson, N. W., Harrington, N., Henning, J. W., Hilton, G. C., Holder, G. P., Holzapfel, W. L., Hrubes, J. D., Huang, N., Hubmayr, J., Irwin, K. D., Knox, L., Lee, A. T., Li, D., Lowitz, A., Luong-Van, D., McMahon, J. J., Mehl, J., Meyer, S. S., Millea, M., Mocanu, L. M., Mohr, J. J., Montgomery, J., Nadolski, A., Natoli, T., Nibarger, J. P., Noble, G., Novosad, V., Omori, Y., Padin, S., Pryke, C., Ruhl, J. E., Saliwanchik, B. R., Sayre, J. T., Schaffer, K. K., Shirokoff, E., Sievers, C., Smecher, G., Spieler, H. G., Staniszewski, Z., Stark, A. A., Tucker, C., Vanderlinde, K., Veach, T., Vieira, J. D., Wang, G., Whitehorn, N., Williamson, R., Wu, W. L. K., Yefremenko, V.

论文摘要

我们报告了在角度多极范围内毫米波电源谱的新测量值$ 2000 \ le \ ell \ le \ le \ le 11,000 $（角度尺度$ 5^\ prime \ prime \gtrsimθ\ gtrsim 1^\ prime $）。通过在SPT-SZ三频2540度$^2 $调查中添加95和150 \ ghz的GHz数据，从低噪声500度$^2 $ SPTPOL调查中，我们大大减少了这些乐队中的不确定性。这些功率谱包括主要宇宙微波背景的贡献，宇宙红外背景，射电星系以及热和运动学Sunyaev-Zel'Dovich（SZ）效应。该数据有利于$ d^{\ rm tsz} _ {\ rm tsz} _ {3000} = 3.42 \ pm 0.54〜μ {\ rm k}^2 $和kinematic sz（ksz（ksz）的功率$ d^{\ rm ksz}^3000， μ{\ rm k}^2 $。这是$ \ ge 3 \，σ$的首次测量。我们研究了测得的KSZ功率对电离时期的含义，发现电离的持续时间为$Δz_{re} = 1.0^{+1.6} _ { - 0.7} $（$Δz_{repue} <4.1 <4.1 <4.1 $ 95％的信心），与我们之前的ts biss pectermect pectertim pectert ts bisspect pectrum pectertimpect。

We report new measurements of millimeter-wave power spectra in the angular multipole range $2000 \le \ell \le 11,000$ (angular scales $5^\prime \gtrsim θ\gtrsim 1^\prime$). By adding 95 and 150\,GHz data from the low-noise 500 deg$^2$ SPTpol survey to the SPT-SZ three-frequency 2540 deg$^2$ survey, we substantially reduce the uncertainties in these bands. These power spectra include contributions from the primary cosmic microwave background, cosmic infrared background, radio galaxies, and thermal and kinematic Sunyaev-Zel'dovich (SZ) effects. The data favor a thermal SZ (tSZ) power at 143\,GHz of $D^{\rm tSZ}_{3000} = 3.42 \pm 0.54~ μ{\rm K}^2$ and a kinematic SZ (kSZ) power of $D^{\rm kSZ}_{3000} = 3.0 \pm 1.0~ μ{\rm K}^2$. This is the first measurement of kSZ power at $\ge 3\,σ$. We study the implications of the measured kSZ power for the epoch of reionization, finding the duration of reionization to be $Δz_{re} = 1.0^{+1.6}_{-0.7}$ ($Δz_{re}< 4.1$ at 95% confidence), when combined with our previously published tSZ bispectrum measurement.

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