1. First Constraints on the Epoch of Reionization Using the Non-Gaussianity of the Kinematic Sunyaev-Zel'dovich Effect from the South Pole Telescope and Herschel-SPIRE Observations.
- Author
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Raghunathan S, Ade PAR, Anderson AJ, Ansarinejad B, Archipley M, Austermann JE, Balkenhol L, Beall JA, Benabed K, Bender AN, Benson BA, Bianchini F, Bleem LE, Bock J, Bouchet FR, Bryant L, Camphuis E, Carlstrom JE, Cecil TW, Chang CL, Chaubal P, Chiang HC, Chichura PM, Chou TL, Citron R, Coerver A, Crawford TM, Crites AT, Cukierman A, Daley C, Dibert KR, Dobbs MA, Doussot A, Dutcher D, Everett W, Feng C, Ferguson KR, Fichman K, Foster A, Galli S, Gallicchio J, Gambrel AE, Gardner RW, Ge F, George EM, Goeckner-Wald N, Gualtieri R, Guidi F, Guns S, Gupta N, de Haan T, Halverson NW, Hivon E, Holder GP, Holzapfel WL, Hood JC, Hrubes JD, Hryciuk A, Huang N, Hubmayr J, Irwin KD, Kéruzoré F, Khalife AR, Knox L, Korman M, Kornoelje K, Kuo CL, Lee AT, Levy K, Li D, Lowitz AE, Lu C, Maniyar A, Martsen ES, McMahon JJ, Menanteau F, Millea M, Montgomery J, Corbett Moran C, Nakato Y, Natoli T, Nibarger JP, Noble GI, Novosad V, Omori Y, Padin S, Pan Z, Paschos P, Patil S, Phadke KA, Prabhu K, Pryke C, Quan W, Rahimi M, Rahlin A, Reichardt CL, Rouble M, Ruhl JE, Saliwanchik BR, Schaffer KK, Schiappucci E, Sievers C, Smecher G, Sobrin JA, Stark AA, Stephen J, Suzuki A, Tandoi C, Thompson KL, Thorne B, Trendafilova C, Tucker C, Umilta C, Veach T, Vieira JD, Viero MP, Wan Y, Wang G, Whitehorn N, Wu WLK, Yefremenko V, Young MR, Zebrowski JA, and Zemcov M
- Abstract
We report results from an analysis aimed at detecting the trispectrum of the kinematic Sunyaev-Zel'dovich (kSZ) effect by combining data from the South Pole Telescope (SPT) and Herschel-SPIRE experiments over a 100 deg^{2} field. The SPT observations combine data from the previous and current surveys, namely SPTpol and SPT-3G, to achieve depths of 4.5, 3, and 16 μK-arcmin in bands centered at 95, 150, and 220 GHz. For SPIRE, we include data from the 600 and 857 GHz bands. We reconstruct the velocity-induced large-scale correlation of the small-scale kSZ signal with a quadratic estimator that uses two cosmic microwave background (CMB) temperature maps, constructed by optimally combining data from all the frequency bands. We reject the null hypothesis of a zero trispectrum at 10.3σ level. However, the measured trispectrum contains contributions from both the kSZ and other undesired components, such as CMB lensing and astrophysical foregrounds, with kSZ being sub-dominant. We use the agora simulations to estimate the expected signal from CMB lensing and astrophysical foregrounds. After accounting for the contributions from CMB lensing and foreground signals, we do not detect an excess kSZ-only trispectrum and use this nondetection to set constraints on reionization. By applying a prior based on observations of the Gunn-Peterson trough, we obtain an upper limit on the duration of reionization of Δz_{re,50}<4.5 (95% confidence level). We find these constraints are fairly robust to foregrounds assumptions. This trispectrum measurement is independent of, but consistent with, Planck's optical depth measurement. This result is the first constraint on the epoch of reionization using the non-Gaussian nature of the kSZ signal.
- Published
- 2024
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