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An Improved Measurement of the Secondary Cosmic Microwave Background Anisotropies from the SPT-SZ + SPTpol Surveys
C. L. Reichardt, S. Patil, P. A. R. Ade, A. J. Anderson, J. E. Austermann, J. S. Avva, E. Baxter, J. A. Beall, A. N. Bender, B. A. Benson, F. Bianchini, L. E. Bleem, J. E. Carlstrom, C. L. Chang, P. Chaubal, H. C. Chiang, T. L. Chou, R. Citron, C. Corbett Moran, T. M. Crawford, A. T. Crites, T. de Haan, M. A. Dobbs, W. Everett, J. Gallicchio, E. M. George, A. Gilbert, N. Gupta, N. W. Halverson, N. Harrington, J. W. Henning, G. C. Hilton, G. P. Holder, W. L. Holzapfel, J. D. Hrubes, N. Huang, J. Hubmayr, K. D. Irwin, L. Knox, A. T. Lee, D. Li, A. Lowitz, D. Luong-Van, J. J. McMahon, J. Mehl, S. S. Meyer, M. Millea, L. M. Mocanu, J. J. Mohr, J. Montgomery, A. Nadolski, T. Natoli, J. P. Nibarger, G. Noble, V. Novosad, Y. Omori, S. Padin, C. Pryke, J. E. Ruhl, B. R. Saliwanchik, J. T. Sayre, K. K. Schaffer, E. Shirokoff, C. Sievers, G. Smecher, H. G. Spieler, Z. Staniszewski, A. A. Stark, C. Tucker, K. Vanderlinde, T. Veach, J. D. Vieira, G. Wang, N. Whitehorn, R. Williamson, W. L. K. Wu, V. Yefremenko
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We report new measurements of millimeter-wave power spectra in the angular multipole range 2000 ≤ℓ≤11,000 (angular scales 5^' ≳θ≳1^'). By adding 95 and 150\,GHz data from the low-noise 500 deg² SPTpol survey to the SPT-SZ three-frequency 2540 deg² 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^(tSZ)₃₀₀₀ = 3.42 ±0.54 μK² and a kinematic SZ (kSZ) power of D^(kSZ)₃₀₀₀ = 3.0 ±1.0 μK². This is the first measurement of kSZ power at ≥3 σ. We study the implications of the measured kSZ power for the epoch of reionization, finding the duration of reionization to be Δzᵣₑ = 1.0^(+1.6)_(-0.7) (Δzᵣₑ< 4.1 at 95% confidence), when combined with our previously published tSZ bispectrum measurement.
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