Joint analysis of DES Year 3 data and CMB lensing from SPT and Planck III: Combined cosmological constraints

• Published in: Physical Review D
• Main Authors: Abbott, T.M.C., Aguena, M., Alarcon, A., Alves, O., Amon, A., Andrade-Oliveira, F., Annis, J., Ansarinejad, B., Avila, S., Bacon, D., Baxter, E.J., Bechtol, K., Becker, M.R., Benson, B.A., Bernstein, G.M., Bertin, E., Blazek, J., Bleem, L.E., Bocquet, S., Brooks, D., Buckley-Geer, E., Burke, D.L., Camacho, H., Campos, A., Carlstrom, J.E., Carnero Rosell, A., Carrasco Kind, M., Carretero, J., Cawthon, R., Chang, C., Chang, C.L., Chen, R., Choi, A., Chown, R., Conselice, C., Cordero, J., Costanzi, M., Crawford, T., Crites, A.T., Crocce, M., da Costa, L.N., Davis, C., Davis, T.M., de Haan, T., de Vicente, J., Derose, J., Desai, S., Diehl, H.T., Dobbs, M.A., Dodelson, S., Doel, P., Doux, C., Drlica-Wagner, A., Eckert, K., Eifler, T.F., Elsner, F., Elvin-Poole, J., Everett, S., Everett, W., Fang, X., Ferrero, I., Ferté, A., Flaugher, B., Fosalba, P., Friedrich, O., Frieman, J., García-Bellido, J., Gatti, M., George, E.M., Giannantonio, T., Giannini, G., Gruen, D., Gruendl, R.A., Gschwend, J., Gutierrez, G., Halverson, N.W., Harrison, I., Herner, K., Hinton, S.R., Holder, G.P., Hollowood, D.L., Holzapfel, W.L., Honscheid, K., Hrubes, J.D., Huang, H., Huff, E.M., Huterer, D., Jain, B., James, D.J., Jarvis, M., Jeltema, T., Kent, S., Knox, L., Kovacs, A., Krause, E., Kuehn, K., Kuropatkin, N., Lahav, O., Lee, A.T., Leget, P.-F., Lemos, P., Liddle, A.R., Lidman, C., Luong-Van, D., Mcmahon, J.J., Maccrann, N., March, M., Marshall, J.L., Martini, P., Mccullough, J., Melchior, P., Menanteau, F., Meyer, S.S., Miquel, R., Mocanu, L., Mohr, J.J., Morgan, R., Muir, J., Myles, J., Natoli, T., Navarro-Alsina, A., Nichol, R.C., Omori, Y., Padin, S., Pandey, S., Park, Y., Paz-Chinchón, F., Pereira, M.E.S., Pieres, A., Plazas Malagón, A.A., Porredon, A., Prat, J., Pryke, C., Raveri, M., Reichardt, C.L., Rollins, R.P., Romer, A.K., Roodman, A., Rosenfeld, R., Ross, A.J., Ruhl, J.E., Rykoff, E.S., Sánchez, C., Sanchez, E., Sanchez, J., Schaffer, K.K., Secco, L.F., Sevilla-Noarbe, I., Sheldon, E., Shin, T., Shirokoff, E., Smith, M., Staniszewski, Z., Stark, A.A., Suchyta, E., Swanson, M.E.C., Tarle, G., To, C., Troxel, M.A., Tutusaus, I., Varga, T.N., Vieira, J.D., Weaverdyck, N., Wechsler, R.H., Weller, J., Williamson, R., Wu, W.L.K., Yanny, B., Yin, B., Zhang, Y., Zuntz, J.
• Other Authors: Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP), Université Grenoble Alpes (UGA), The Art Institute of Chicago (AIC), Kavli Institute for Cosmological Physics Chicago (KICP), University of Chicago, Enrico Fermi Institute, DES, SPT
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2023
• Subjects: [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]; Lambda; South Pole; South pole
• Online Access: https://hal.science/hal-03712811; https://doi.org/10.1103/PhysRevD.107.023531

International audience We present cosmological constraints from the analysis of two-point correlation functions between galaxy positions and galaxy lensing measured in Dark Energy Survey (DES) Year 3 data and measurements of cosmic microwave background (CMB) lensing from the South Pole Telescope (SPT) and Planck. When jointly analyzing the DES-only two-point functions and the DES cross-correlations with SPT+Planck CMB lensing, we find $\Omega_{\rm m} = 0.344\pm 0.030$ and $S_8 \equiv \sigma_8 (\Omega_{\rm m}/0.3)^{0.5} = 0.773\pm 0.016$, assuming $\Lambda$CDM. When additionally combining with measurements of the CMB lensing autospectrum, we find $\Omega_{\rm m} = 0.306^{+0.018}_{-0.021}$ and $S_8 = 0.792\pm 0.012$. The high signal-to-noise of the CMB lensing cross-correlations enables several powerful consistency tests of these results, including comparisons with constraints derived from cross-correlations only, and comparisons designed to test the robustness of the galaxy lensing and clustering measurements from DES. Applying these tests to our measurements, we find no evidence of significant biases in the baseline cosmological constraints from the DES-only analyses or from the joint analyses with CMB lensing cross-correlations. However, the CMB lensing cross-correlations suggest possible problems with the correlation function measurements using alternative lens galaxy samples, in particular the redMaGiC galaxies and high-redshift MagLim galaxies, consistent with the findings of previous studies. We use the CMB lensing cross-correlations to identify directions for further investigating these problems.