Dark Energy Survey Year 1 Results: Tomographic cross-correlations between Dark Energy Survey galaxies and CMB lensing from South Pole Telescope + Planck

• Main Authors: Omori, Y, Giannantonio, T, Porredon, A, Baxter, EJ, Chang, C, Crocce, M, Fosalba, P, Alarcon, A, Banik, N, Blazek, J, Bleem, LE, Bridle, SL, Cawthon, R, Choi, A, Chown, R, Crawford, T, Dodelson, S, Drlica-Wagner, A, Eifler, TF, Elvin-Poole, J, Friedrich, O, Gruen, D, Holder, GP, Huterer, D, Jain, B, Jarvis, M, Kirk, D, Kokron, N, Krause, E, MacCrann, N, Muir, J, Prat, J, Reichardt, CL, Ross, AJ, Rozo, E, Rykoff, ES, Sanchez, C, Secco, LF, Simard, G, Wechsler, RH, Zuntz, J, Abbott, TMC, Abdalla, FB, Allam, S, Avila, S, Aylor, K, Benson, BA, Bernstein, GM, Bertin, E, Bianchini, F, Brooks, D, Buckley-Geer, E, Burke, DL, Carlstrom, JE, Carnero Rosell, A, Carrasco Kind, M, Carretero, J, Castander, FJ, Chang, CL, Cho, H-M, Crites, AT, Cunha, CE, da Costa, LN, de Haan, T, Davis, C, De Vicente, J, Desai, S, Diehl, HT, Dietrich, JP, Dobbs, MA, Everett, WB, Doel, P, Estrada, J, Flaugher, B, Frieman, J, Garcia-Bellido, J, Gaztanaga, E, Gerdes, DW, George, EM, Gruendl, RA, Gschwend, J, Gutierrez, G, Halverson, NW, Harrington, NL, Hartley, WG, Hollowood, DL, Holzapfel, WL, Honscheid, K, Hou, Z, Hoyle, B, Hrubes, JD, James, DJ, Jeltema, T, Kuehn, K, Kuropatkin, N, Lee, AT, Leitch, EM, Lima, M, Luong-Van, D, Manzotti, A, Marrone, DP, Marshall, JL, McMahon, JJ, Melchior, P, Menanteau, F, Meyer, SS, Miller, CJ, Miquel, R, Mocanu, LM, Mohr, JJ, Natoli, T, Padin, S, Plazas, AA, Pryke, C, Romer, AK, Roodman, A, Ruhl, JE, Sanchez, E, Scarpine, V, Schaffer, KK, Schubnell, M, Serrano, S, Sevilla-Noarbe, I, Shirokoff, E, Smith, M, Soares-Santos, M, Sobreira, F, Staniszewski, Z, Stark, AA, Story, KT, Suchyta, E, Swanson, MEC, Tarle, G, Thomas, D, Troxel, MA, Vanderlinde, K, Vieira, JD, Walker, AR, Wu, WLK, Zahn, O
• Format: Article in Journal/Newspaper
• Language: English
• Published: AMER PHYSICAL SOC 2019
• Subjects: Cosmic microwave background; Cosmological parameters; Large scale structure of the Universe; South Pole; South pole
• Online Access: https://discovery.ucl.ac.uk/id/eprint/10080286/1/PhysRevD.100.043501.pdf; https://discovery.ucl.ac.uk/id/eprint/10080286/

We measure the cross-correlation between redMaGiC galaxies selected from the Dark Energy Survey (DES) year 1 data and gravitational lensing of the cosmic microwave background (CMB) reconstructed from South Pole Telescope (SPT) and Planck data over 1289 deg 2 . When combining measurements across multiple galaxy redshift bins spanning the redshift range of 0.15 < z < 0.90 , we reject the hypothesis of no correlation at 19.9 σ significance. When removing small-scale data points where thermal Sunyaev-Zel’dovich signal and nonlinear galaxy bias could potentially bias our results, the detection significance is reduced to 9.9 σ . We perform a joint analysis of galaxy-CMB lensing cross-correlations and galaxy clustering to constrain cosmology, finding Ω m = 0.27 6 + 0.029 − 0.030 and S 8 = σ 8 √ Ω m / 0.3 = 0.80 0 + 0.090 − 0.094 . We also perform two alternate analyses aimed at constraining only the growth rate of cosmic structure as a function of redshift, finding consistency with predictions from the concordance Λ CDM model. The measurements presented here are part of a joint cosmological analysis that combines galaxy clustering, galaxy lensing and CMB lensing using data from DES, SPT and Planck.