Detection of the kinematic Sunyaev–Zel'dovich effect with DES Year 1 and SPT

• Published in: Monthly Notices of the Royal Astronomical Society
• Main Authors: Soergel, B., Flender, S., Story, K. T., Bleem, L., Giannantonio, T., Efstathiou, G., Rykoff, E., Benson, B. A., Crawford, T., Dodelson, S., Habib, S., Heitmann, K., Holder, G., Jain, B., Rozo, E., Saro, A., Weller, J., Abdalla, F. B., Allam, S., Annis, J., Armstrong, R., Benoit-Lévy, A., Bernstein, G. M., Carlstrom, J. E., Carnero Rosell, A., Carrasco Kind, M., Castander, F. J., Chiu, I., Chown, R., Crocce, M., Cunha, C. E., D'Andrea, C. B., da Costa, L. N., de Haan, T., Desai, S., Diehl, H. T., Dietrich, J. P., Doel, P., Estrada, J., Evrard, A. E., Flaugher, B., Fosalba, P., Frieman, J., Gaztanaga, E., Gruen, D., Gruendl, R. A., Holzapfel, W. L., Honscheid, K., James, D. J., Keisler, R., Kuehn, K., Kuropatkin, N., Lahav, O., Lima, M., Marshall, J. L., McDonald, M., Melchior, P., Miller, C. J., Miquel, R., Nord, B., Ogando, R., Omori, Y., Plazas, A. A., Rapetti, D., Reichardt, C. L., Romer, A. K., Roodman, A., Saliwanchik, B. R., Sanchez, E., Schubnell, M., Sevilla-Noarbe, I., Sheldon, E., Smith, R. C., Soares-Santos, M., Sobreira, F., Stark, A., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., Vieira, J. D., Walker, A. R., Whitehorn, N.
• Other Authors: Univ Arizona, Dept Phys
• Format: Article in Journal/Newspaper
• Language: English
• Published: OXFORD UNIV PRESS 2016
• Subjects: galaxies: clusters: general; cosmic background radiation; large-scale structure of Universe; Kavli; South Pole; South pole
• Online Access: http://hdl.handle.net/10150/621727; https://doi.org/10.1093/mnras/stw1455

We detect the kinematic Sunyaev-Zel'dovich (kSZ) effect with a statistical significance of 4.2 sigma by combining a cluster catalogue derived from the first year data of the Dark Energy Survey with cosmic microwave background temperature maps from the South Pole Telescope Sunyaev-Zel'dovich Survey. This measurement is performed with a differential statistic that isolates the pairwise kSZ signal, providing the first detection of the large-scale, pairwise motion of clusters using redshifts derived from photometric data. By fitting the pairwise kSZ signal to a theoretical template, we measure the average central optical depth of the cluster sample, (tau) over bar (e) = (3.75 +/- 0.89) x 10(-3). We compare the extracted signal to realistic simulations and find good agreement with respect to the signal to noise, the constraint on (tau) over bar (e), and the corresponding gas fraction. High-precision measurements of the pairwise kSZ signal with future data will be able to place constraints on the baryonic physics of galaxy clusters, and could be used to probe gravity on scales greater than or similar to 100 Mpc. Isaac Newton Studentship at the University of Cambridge; Science and Technologies Facilities Council (STFC); Kavli Foundation; STFC [ST/L000636/1]; Australian Research Council [DP150103208]; US Department of Energy; US National Science Foundation; Ministry of Science and Education of Spain; Science and Technology Facilities Council of the United Kingdom; Higher Education Funding Council for England; National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign; Kavli Institute of Cosmological Physics at the University of Chicago; Center for Cosmology and Astro-Particle Physics at the Ohio State University; Mitchell Institute for Fundamental Physics and Astronomy at Texas AM University; Financiadora de Estudos e Projetos; Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro; Conselho Nacional de Desenvolvimento Cientifico e Tecnologico; Ministerio da Ciencia, Tecnologia e Inovacao; Deutsche Forschungsgemeinschaft; National Science Foundation [AST-1138766, PLR-1248097]; Argonne National Laboratory; University of California at Santa Cruz; University of Cambridge; Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas-Madrid; University of Chicago; University College London; DES-Brazil Consortium; University of Edinburgh; Eidgenossische Technische Hochschule (ETH) Zurich; Fermi National Accelerator Laboratory; University of Illinois at Urbana-Champaign; Institut de Ciencies de l'Espai (IEEC/CSIC); Institut de Fisica d'Altes Energies; Lawrence Berkeley National Laboratory; Ludwig-Maximilians Universitat Munchen; associated Excellence Cluster Universe; University of Michigan; National Optical Astronomy Observatory; University of Nottingham; Ohio State University; University of Pennsylvania; University of Portsmouth; SLAC National Accelerator Laboratory; Stanford University; University of Sussex; Texas AM University; MINECO [AYA2012-39559, ESP2013-48274, FPA2013-47986]; Centro de Excelencia Severo Ochoa [SEV-2012-0234]; European Research Council under the European Union including ERC [240672, 291329, 306478]; NSF Physics Frontier Center [PHY-0114422]; Gordon and Betty Moore Foundation [947]; US Department of Energy [DE-AC02-06CH11357]; DOE/SC [DE-AC02-06CH11357] This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [e-mail].