Search

Your search keyword '"Stalder B"' showing total 21 results
Start Over Author "Stalder B" Publisher iop publishing ltd
21 results on '"Stalder B"'

1. COSMOLOGICAL CONSTRAINTS FROM GALAXY CLUSTERS IN THE 2500 SQUARE-DEGREE SPT-SZ SURVEY

Author

de Haan, T, Benson, BA, Bleem, LE, Allen, SW, Applegate, DE, Ashby, MLN, Bautz, M, Bayliss, M, Bocquet, S, Brodwin, M, Carlstrom, JE, Chang, CL, Chiu, I, Cho, H-M, Clocchiatti, A, Crawford, TM, Crites, AT, Desai, S, Dietrich, JP, Dobbs, MA, Doucouliagos, AN, Foley, RJ, Forman, WR, Garmire, GP, George, EM, Gladders, MD, Gonzalez, AH, Gupta, N, Halverson, NW, Hlavacek-Larrondo, J, Hoekstra, H, Holder, GP, Holzapfel, WL, Hou, Z, Hrubes, JD, Huang, N, Jones, C, Keisler, R, Knox, L, Lee, AT, Leitch, EM, von der Linden, A, Luong-Van, D, Mantz, A, Marrone, DP, McDonald, M, McMahon, JJ, Meyer, SS, Mocanu, LM, Mohr, JJ, Murray, SS, Padin, S, Pryke, C, Rapetti, D, Reichardt, CL, Rest, A, Ruel, J, Ruhl, JE, Saliwanchik, BR, Saro, A, Sayre, JT, Schaffer, KK, Schrabback, T, Shirokoff, E, Song, J, Spieler, HG, Stalder, B, Stanford, SA, Staniszewski, Z, Stark, AA, Story, KT, Stubbs, CW, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, Zenteno, A, de Haan, T, Benson, BA, Bleem, LE, Allen, SW, Applegate, DE, Ashby, MLN, Bautz, M, Bayliss, M, Bocquet, S, Brodwin, M, Carlstrom, JE, Chang, CL, Chiu, I, Cho, H-M, Clocchiatti, A, Crawford, TM, Crites, AT, Desai, S, Dietrich, JP, Dobbs, MA, Doucouliagos, AN, Foley, RJ, Forman, WR, Garmire, GP, George, EM, Gladders, MD, Gonzalez, AH, Gupta, N, Halverson, NW, Hlavacek-Larrondo, J, Hoekstra, H, Holder, GP, Holzapfel, WL, Hou, Z, Hrubes, JD, Huang, N, Jones, C, Keisler, R, Knox, L, Lee, AT, Leitch, EM, von der Linden, A, Luong-Van, D, Mantz, A, Marrone, DP, McDonald, M, McMahon, JJ, Meyer, SS, Mocanu, LM, Mohr, JJ, Murray, SS, Padin, S, Pryke, C, Rapetti, D, Reichardt, CL, Rest, A, Ruel, J, Ruhl, JE, Saliwanchik, BR, Saro, A, Sayre, JT, Schaffer, KK, Schrabback, T, Shirokoff, E, Song, J, Spieler, HG, Stalder, B, Stanford, SA, Staniszewski, Z, Stark, AA, Story, KT, Stubbs, CW, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, and Zenteno, A

Published
2016

2. STAR-FORMING BRIGHTEST CLUSTER GALAXIES AT 0.25 < z < 1.25: A TRANSITIONING FUEL SUPPLY

Author

McDonald, M, Stalder, B, Bayliss, M, Allen, SW, Applegate, DE, Ashby, MLN, Bautz, M, Benson, BA, Bleem, LE, Brodwin, M, Carlstrom, JE, Chiu, I, Desai, S, Gonzalez, AH, Hlavacek-Larrondo, J, Holzapfel, WL, Marrone, DP, Miller, ED, Reichardt, CL, Saliwanchik, BR, Saro, A, Schrabback, T, Stanford, SA, Stark, AA, Vieira, JD, Zenteno, A, McDonald, M, Stalder, B, Bayliss, M, Allen, SW, Applegate, DE, Ashby, MLN, Bautz, M, Benson, BA, Bleem, LE, Brodwin, M, Carlstrom, JE, Chiu, I, Desai, S, Gonzalez, AH, Hlavacek-Larrondo, J, Holzapfel, WL, Marrone, DP, Miller, ED, Reichardt, CL, Saliwanchik, BR, Saro, A, Schrabback, T, Stanford, SA, Stark, AA, Vieira, JD, and Zenteno, A

Published
2016

3. THE EVOLUTION OF THE INTRACLUSTER MEDIUM METALLICITY IN SUNYAEV ZEL'DOVICH- SELECTED GALAXY CLUSTERS AT 0 > z > 1.5

Author

McDonald, M, Bulbul, E, de Haan, T, Miller, ED, Benson, BA, Bleem, LE, Brodwin, M, Carlstrom, JE, Chiu, I, Forman, WR, Hlavacek-Larrondo, J, Garmire, GP, Gupta, N, Mohr, JJ, Reichardt, CL, Saro, A, Stalder, B, Stark, AA, Vieira, JD, McDonald, M, Bulbul, E, de Haan, T, Miller, ED, Benson, BA, Bleem, LE, Brodwin, M, Carlstrom, JE, Chiu, I, Forman, WR, Hlavacek-Larrondo, J, Garmire, GP, Gupta, N, Mohr, JJ, Reichardt, CL, Saro, A, Stalder, B, Stark, AA, and Vieira, JD

Published
2016

4. SPT-GMOS: A GEMINI/GMOS-SOUTH SPECTROSCOPIC SURVEY OF GALAXY CLUSTERS IN THE SPT-SZ SURVEY

Author

Bayliss, MB, Ruel, J, Stubbs, CW, Allen, SW, Applegate, DE, Ashby, MLN, Bautz, M, Benson, BA, Bleem, LE, Bocquet, S, Brodwin, M, Capasso, R, Carlstrom, JE, Chang, CL, Chiu, I, Cho, H-M, Clocchiatti, A, Crawford, TM, Crites, AT, de Haan, T, Desai, S, Dietrich, JP, Dobbs, MA, Doucouliagos, AN, Foley, RJ, Forman, WR, Garmire, GP, George, EM, Gladders, MD, Gonzalez, AH, Gupta, N, Halverson, NW, Hlavacek-Larrondo, J, Hoekstra, H, Holder, GP, Holzapfel, WL, Hou, Z, Hrubes, JD, Huang, N, Jones, C, Keisler, R, Knox, L, Lee, AT, Leitch, EM, von der Linden, A, Luong-Van, D, Mantz, A, Marrone, DP, McDonald, M, McMahon, JJ, Meyer, SS, Mocanu, LM, Mohr, JJ, Murray, SS, Padin, S, Pryke, C, Rapetti, D, Reichardt, CL, Rest, A, Ruhl, JE, Saliwanchik, BR, Saro, A, Sayre, JT, Schaffer, KK, Schrabback, T, Shirokoff, E, Song, J, Spieler, HG, Stalder, B, Stanford, SA, Staniszewski, Z, Stark, AA, Story, KT, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, Zenteno, A, Bayliss, MB, Ruel, J, Stubbs, CW, Allen, SW, Applegate, DE, Ashby, MLN, Bautz, M, Benson, BA, Bleem, LE, Bocquet, S, Brodwin, M, Capasso, R, Carlstrom, JE, Chang, CL, Chiu, I, Cho, H-M, Clocchiatti, A, Crawford, TM, Crites, AT, de Haan, T, Desai, S, Dietrich, JP, Dobbs, MA, Doucouliagos, AN, Foley, RJ, Forman, WR, Garmire, GP, George, EM, Gladders, MD, Gonzalez, AH, Gupta, N, Halverson, NW, Hlavacek-Larrondo, J, Hoekstra, H, Holder, GP, Holzapfel, WL, Hou, Z, Hrubes, JD, Huang, N, Jones, C, Keisler, R, Knox, L, Lee, AT, Leitch, EM, von der Linden, A, Luong-Van, D, Mantz, A, Marrone, DP, McDonald, M, McMahon, JJ, Meyer, SS, Mocanu, LM, Mohr, JJ, Murray, SS, Padin, S, Pryke, C, Rapetti, D, Reichardt, CL, Rest, A, Ruhl, JE, Saliwanchik, BR, Saro, A, Sayre, JT, Schaffer, KK, Schrabback, T, Shirokoff, E, Song, J, Spieler, HG, Stalder, B, Stanford, SA, Staniszewski, Z, Stark, AA, Story, KT, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, and Zenteno, A

Published
2016

5. A MEASUREMENT OF GRAVITATIONAL LENSING OF THE COSMIC MICROWAVE BACKGROUND BY GALAXY CLUSTERS USING DATA FROM THE SOUTH POLE TELESCOPE

Author

Baxter, EJ, Keisler, R, Dodelson, S, Aird, KA, Allen, SW, Ashby, MLN, Bautz, M, Bayliss, M, Benson, BA, Bleem, LE, Bocquet, S, Brodwin, M, Carlstrom, JE, Chang, CL, Chiu, I, Cho, H-M, Clocchiatti, A, Crawford, TM, Crites, AT, Desai, S, Dietrich, JP, de Haan, T, Dobbs, MA, Foley, RJ, Forman, WR, George, EM, Gladders, MD, Gonzalez, AH, Halverson, NW, Harrington, NL, Hennig, C, Hoekstra, H, Holder, GP, Holzapfel, WL, Hou, Z, Hrubes, JD, Jones, C, Knox, L, Lee, AT, Leitch, EM, Liu, J, Lueker, M, Luong-Van, D, Mantz, A, Marrone, DP, McDonald, M, McMahon, JJ, Meyer, SS, Millea, M, Mocanu, LM, Murray, SS, Padin, S, Pryke, C, Reichardt, CL, Rest, A, Ruhl, JE, Saliwanchik, BR, Saro, A, Sayre, JT, Schaffer, KK, Shirokoff, E, Song, J, Spieler, HG, Stalder, B, Stanford, SA, Staniszewski, Z, Stark, AA, Story, KT, van Engelen, A, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, Zahn, O, Zenteno, A, Baxter, EJ, Keisler, R, Dodelson, S, Aird, KA, Allen, SW, Ashby, MLN, Bautz, M, Bayliss, M, Benson, BA, Bleem, LE, Bocquet, S, Brodwin, M, Carlstrom, JE, Chang, CL, Chiu, I, Cho, H-M, Clocchiatti, A, Crawford, TM, Crites, AT, Desai, S, Dietrich, JP, de Haan, T, Dobbs, MA, Foley, RJ, Forman, WR, George, EM, Gladders, MD, Gonzalez, AH, Halverson, NW, Harrington, NL, Hennig, C, Hoekstra, H, Holder, GP, Holzapfel, WL, Hou, Z, Hrubes, JD, Jones, C, Knox, L, Lee, AT, Leitch, EM, Liu, J, Lueker, M, Luong-Van, D, Mantz, A, Marrone, DP, McDonald, M, McMahon, JJ, Meyer, SS, Millea, M, Mocanu, LM, Murray, SS, Padin, S, Pryke, C, Reichardt, CL, Rest, A, Ruhl, JE, Saliwanchik, BR, Saro, A, Sayre, JT, Schaffer, KK, Shirokoff, E, Song, J, Spieler, HG, Stalder, B, Stanford, SA, Staniszewski, Z, Stark, AA, Story, KT, van Engelen, A, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, Zahn, O, and Zenteno, A

Abstract

Clusters of galaxies are expected to gravitationally lens the cosmic microwave background (CMB) and thereby generate a distinct signal in the CMB on arcminute scales. Measurements of this effect can be used to constrain the masses of galaxy clusters with CMB data alone. Here we present a measurement of lensing of the CMB by galaxy clusters using data from the South Pole Telescope (SPT). We develop a maximum likelihood approach to extract the CMB cluster lensing signal and validate the method on mock data. We quantify the effects on our analysis of several potential sources of systematic error and find that they generally act to reduce the best-fit cluster mass. It is estimated that this bias to lower cluster mass is roughly $0.85\sigma$ in units of the statistical error bar, although this estimate should be viewed as an upper limit. We apply our maximum likelihood technique to 513 clusters selected via their SZ signatures in SPT data, and rule out the null hypothesis of no lensing at $3.1\sigma$. The lensing-derived mass estimate for the full cluster sample is consistent with that inferred from the SZ flux: $M_{200,\mathrm{lens}} = 0.83_{-0.37}^{+0.38}\, M_{200,\mathrm{SZ}}$ (68% C.L., statistical error only).

Published
2015

6. MEASUREMENT OF GALAXY CLUSTER INTEGRATED COMPTONIZATION AND MASS SCALING RELATIONS WITH THE SOUTH POLE TELESCOPE

Author

Saliwanchik, BR, Montroy, TE, Aird, KA, Bayliss, M, Benson, BA, Bleem, LE, Bocquet, S, Brodwin, M, Carlstrom, JE, Chang, CL, Cho, HM, Clocchiatti, A, Crawford, TM, Crites, AT, de Haan, T, Desai, S, Dobbs, MA, Dudley, JP, Foley, RJ, Forman, WR, George, EM, Gladders, MD, Gonzalez, AH, Halverson, NW, Hlavacek-Larrondo, J, Holder, GP, Holzapfel, WL, Hrubes, JD, Jones, C, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Liu, J, Lueker, M, Luong-Van, D, Mantz, A, Marrone, DP, McDonald, M, McMahon, JJ, Mehl, J, Meyer, SS, Mocanu, L, Mohr, JJ, Murray, SS, Nurgaliev, D, Padin, S, Patej, A, Pryke, C, Reichardt, CL, Rest, A, Ruel, J, Ruhl, JE, Saro, A, Sayre, JT, Schaffer, KK, Shirokoff, E, Spieler, HG, Stalder, B, Stanford, SA, Staniszewski, Z, Stark, AA, Story, K, Stubbs, CW, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, Zahn, O, Zenteno, A, Saliwanchik, BR, Montroy, TE, Aird, KA, Bayliss, M, Benson, BA, Bleem, LE, Bocquet, S, Brodwin, M, Carlstrom, JE, Chang, CL, Cho, HM, Clocchiatti, A, Crawford, TM, Crites, AT, de Haan, T, Desai, S, Dobbs, MA, Dudley, JP, Foley, RJ, Forman, WR, George, EM, Gladders, MD, Gonzalez, AH, Halverson, NW, Hlavacek-Larrondo, J, Holder, GP, Holzapfel, WL, Hrubes, JD, Jones, C, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Liu, J, Lueker, M, Luong-Van, D, Mantz, A, Marrone, DP, McDonald, M, McMahon, JJ, Mehl, J, Meyer, SS, Mocanu, L, Mohr, JJ, Murray, SS, Nurgaliev, D, Padin, S, Patej, A, Pryke, C, Reichardt, CL, Rest, A, Ruel, J, Ruhl, JE, Saro, A, Sayre, JT, Schaffer, KK, Shirokoff, E, Spieler, HG, Stalder, B, Stanford, SA, Staniszewski, Z, Stark, AA, Story, K, Stubbs, CW, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, Zahn, O, and Zenteno, A

Abstract

We describe a method for measuring the integrated Comptonization (YSZ) of clusters of galaxies from measurements of the Sunyaev-Zel'dovich (SZ) effect in multiple frequency bands and use this method to characterize a sample of galaxy clusters detected in South Pole Telescope (SPT) data. We test this method on simulated cluster observations and verify that it can accurately recover cluster parameters with negligible bias. In realistic simulations of an SPT-like survey, with realizations of cosmic microwave background anisotropy, point sources, and atmosphere and instrumental noise at typical SPT-SZ survey levels, we find that YSZ is most accurately determined in an aperture comparable to the SPT beam size. We demonstrate the utility of this method to measure YSZ and to constrain mass scaling relations using X-ray mass estimates for a sample of 18 galaxy clusters from the SPT-SZ survey. Measuring YSZ within a 0.75' radius aperture, we find an intrinsic log-normal scatter of 21+/-11% in YSZ at a fixed mass. Measuring YSZ within a 0.3 Mpc projected radius (equivalent to 0.75' at the survey median redshift z = 0.6), we find a scatter of 26+/-9%. Prior to this study, the SPT observable found to have the lowest scatter with mass was cluster detection significance. We demonstrate, from both simulations and SPT observed clusters, that YSZ measured within an aperture comparable to the SPT beam size is equivalent, in terms of scatter with cluster mass, to SPT cluster detection significance.

Published
2015

7. GALAXY CLUSTERS DISCOVERED VIA THE SUNYAEV-ZEL'DOVICH EFFECT IN THE 2500-SQUARE-DEGREE SPT-SZ SURVEY

Author

Bleem, LE, Stalder, B, de Haan, T, Aird, KA, Allen, SW, Applegate, DE, Ashby, MLN, Bautz, M, Bayliss, M, Benson, BA, Bocquet, S, Brodwin, M, Carlstrom, JE, Chang, CL, Chiu, I, Cho, HM, Clocchiatti, A, Crawford, TM, Crites, AT, Desai, S, Dietrich, JP, Dobbs, MA, Foley, RJ, Forman, WR, George, EM, Gladders, MD, Gonzalez, AH, Halverson, NW, Hennig, C, Hoekstra, H, Holder, GP, Holzapfel, WL, Hrubes, JD, Jones, C, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Liu, J, Lueker, M, Luong-Van, D, Mantz, A, Marrone, DP, McDonald, M, McMahon, JJ, Meyer, SS, Mocanu, L, Mohr, JJ, Murray, SS, Padin, S, Pryke, C, Reichardt, CL, Rest, A, Ruel, J, Ruhl, JE, Saliwanchik, BR, Saro, A, Sayre, JT, Schaffer, KK, Schrabback, T, Shirokoff, E, Song, J, Spieler, HG, Stanford, SA, Staniszewski, Z, Stark, AA, Story, KT, Stubbs, CW, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, Zahn, O, Zenteno, A, Bleem, LE, Stalder, B, de Haan, T, Aird, KA, Allen, SW, Applegate, DE, Ashby, MLN, Bautz, M, Bayliss, M, Benson, BA, Bocquet, S, Brodwin, M, Carlstrom, JE, Chang, CL, Chiu, I, Cho, HM, Clocchiatti, A, Crawford, TM, Crites, AT, Desai, S, Dietrich, JP, Dobbs, MA, Foley, RJ, Forman, WR, George, EM, Gladders, MD, Gonzalez, AH, Halverson, NW, Hennig, C, Hoekstra, H, Holder, GP, Holzapfel, WL, Hrubes, JD, Jones, C, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Liu, J, Lueker, M, Luong-Van, D, Mantz, A, Marrone, DP, McDonald, M, McMahon, JJ, Meyer, SS, Mocanu, L, Mohr, JJ, Murray, SS, Padin, S, Pryke, C, Reichardt, CL, Rest, A, Ruel, J, Ruhl, JE, Saliwanchik, BR, Saro, A, Sayre, JT, Schaffer, KK, Schrabback, T, Shirokoff, E, Song, J, Spieler, HG, Stanford, SA, Staniszewski, Z, Stark, AA, Story, KT, Stubbs, CW, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, Zahn, O, and Zenteno, A

Abstract

We present a catalog of galaxy clusters selected via their Sunyaev-Zel'dovich (SZ) effect signature from 2500 deg$^2$ of South Pole Telescope (SPT) data. This work represents the complete sample of clusters detected at high significance in the 2500-square-degree SPT-SZ survey, which was completed in 2011. A total of 677 (409) cluster candidates are identified above a signal-to-noise threshold of $\xi$ =4.5 (5.0). Ground- and space-based optical and near-infrared (NIR) imaging confirms overdensities of similarly colored galaxies in the direction of 516 (or 76%) of the $\xi$>4.5 candidates and 387 (or 95%) of the $\xi$>5 candidates; the measured purity is consistent with expectations from simulations. Of these confirmed clusters, 415 were first identified in SPT data, including 251 new discoveries reported in this work. We estimate photometric redshifts for all candidates with identified optical and/or NIR counterparts; we additionally report redshifts derived from spectroscopic observations for 141 of these systems. The mass threshold of the catalog is roughly independent of redshift above $z$~0.25 leading to a sample of massive clusters that extends to high redshift. The median mass of the sample is $M_{\scriptsize 500c}(\rho_\mathrm{crit})$ ~ 3.5 x 10$^{14} M_\odot h^{-1}$, the median redshift is $z_{med}$ =0.55, and the highest-redshift systems are at $z$>1.4. The combination of large redshift extent, clean selection, and high typical mass makes this cluster sample of particular interest for cosmological analyses and studies of cluster formation and evolution.

Published
2015

8. THE REST-FRAME SUBMILLIMETER SPECTRUM OF HIGH-REDSHIFT, DUSTY, STAR-FORMING GALAXIES

Author

Spilker, JS, Marrone, DP, Aguirre, E, Aravena, M, Ashby, MLN, Bethermin, M, Bradford, CM, Bothwell, MS, Brodwin, M, Carlstrom, JE, Chapman, SC, Crawford, TM, de Breuck, C, Fassnacht, CD, Gonzalez, AH, Greve, TR, Gullberg, B, Hezaveh, Y, Holzapfel, WL, Husband, K, Ma, J, Malkan, M, Murphy, EJ, Reichardt, CL, Rotermund, KM, Stalder, B, Stark, AA, Strandet, M, Vieira, JD, Weiss, A, Welikala, N, Spilker, JS, Marrone, DP, Aguirre, E, Aravena, M, Ashby, MLN, Bethermin, M, Bradford, CM, Bothwell, MS, Brodwin, M, Carlstrom, JE, Chapman, SC, Crawford, TM, de Breuck, C, Fassnacht, CD, Gonzalez, AH, Greve, TR, Gullberg, B, Hezaveh, Y, Holzapfel, WL, Husband, K, Ma, J, Malkan, M, Murphy, EJ, Reichardt, CL, Rotermund, KM, Stalder, B, Stark, AA, Strandet, M, Vieira, JD, Weiss, A, and Welikala, N

Published
2014

9. Optical Spectroscopy and Velocity Dispersions of Galaxy Clusters from the SPT-SZ Survey

Author

Ruel, J, Bazin, G, Bayliss, M, Brodwin, M, Foley, RJ, Stalder, B, Aird, KA, Armstrong, R, Ashby, MLN, Bautz, M, Benson, BA, Bleem, LE, Bocquet, S, Carlstrom, JE, Chang, CL, Chapman, SC, Cho, HM, Clocchiatti, A, Crawford, TM, Crites, AT, de Haan, T, Desai, S, Dobbs, MA, Dudley, JP, Forman, WR, George, EM, Gladders, MD, Gonzalez, AH, Halverson, NW, Harrington, NL, High, FW, Holder, GP, Holzapfel, WL, Hrubes, JD, Jones, C, Joy, M, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Liu, J, Lueker, M, Luong-Van, D, Mantz, A, Marrone, DP, McDonald, M, McMahon, JJ, Mehl, J, Meyer, SS, Mocanu, L, Mohr, JJ, Montroy, TE, Murray, SS, Natoli, T, Nurgaliev, D, Padin, S, Plagge, T, Pryke, C, Reichardt, CL, Rest, A, Ruhl, JE, Saliwanchik, BR, Saro, A, Sayre, JT, Schaffer, KK, Shaw, L, Shirokoff, E, Song, J, v Suhada, R, Spieler, HG, Stanford, SA, Staniszewski, Z, Starsk, AA, Story, K, Stubbs, CW, van Engelen, A, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, Zahn, O, Zenteno, A, Ruel, J, Bazin, G, Bayliss, M, Brodwin, M, Foley, RJ, Stalder, B, Aird, KA, Armstrong, R, Ashby, MLN, Bautz, M, Benson, BA, Bleem, LE, Bocquet, S, Carlstrom, JE, Chang, CL, Chapman, SC, Cho, HM, Clocchiatti, A, Crawford, TM, Crites, AT, de Haan, T, Desai, S, Dobbs, MA, Dudley, JP, Forman, WR, George, EM, Gladders, MD, Gonzalez, AH, Halverson, NW, Harrington, NL, High, FW, Holder, GP, Holzapfel, WL, Hrubes, JD, Jones, C, Joy, M, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Liu, J, Lueker, M, Luong-Van, D, Mantz, A, Marrone, DP, McDonald, M, McMahon, JJ, Mehl, J, Meyer, SS, Mocanu, L, Mohr, JJ, Montroy, TE, Murray, SS, Natoli, T, Nurgaliev, D, Padin, S, Plagge, T, Pryke, C, Reichardt, CL, Rest, A, Ruhl, JE, Saliwanchik, BR, Saro, A, Sayre, JT, Schaffer, KK, Shaw, L, Shirokoff, E, Song, J, v Suhada, R, Spieler, HG, Stanford, SA, Staniszewski, Z, Starsk, AA, Story, K, Stubbs, CW, van Engelen, A, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, Zahn, O, and Zenteno, A

Abstract

We present optical spectroscopy of galaxies in clusters detected through the Sunyaev-Zel'dovich (SZ) effect with the South Pole Telescope (SPT). We report our own measurements of $61$ spectroscopic cluster redshifts, and $48$ velocity dispersions each calculated with more than $15$ member galaxies. This catalog also includes $19$ dispersions of SPT-observed clusters previously reported in the literature. The majority of the clusters in this paper are SPT-discovered; of these, most have been previously reported in other SPT cluster catalogs, and five are reported here as SPT discoveries for the first time. By performing a resampling analysis of galaxy velocities, we find that unbiased velocity dispersions can be obtained from a relatively small number of member galaxies ($\lesssim 30$), but with increased systematic scatter. We use this analysis to determine statistical confidence intervals that include the effect of membership selection. We fit scaling relations between the observed cluster velocity dispersions and mass estimates from SZ and X-ray observables. In both cases, the results are consistent with the scaling relation between velocity dispersion and mass expected from dark-matter simulations. We measure a $\sim$30% log-normal scatter in dispersion at fixed mass, and a $\sim$10% offset in the normalization of the dispersion-mass relation when compared to the expectation from simulations, which is within the expected level of systematic uncertainty.

Published
2014

10. THE REDSHIFT EVOLUTION OF THE MEAN TEMPERATURE, PRESSURE, AND ENTROPY PROFILES IN 80 SPT-SELECTED GALAXY CLUSTERS

Author

McDonald, M, Benson, BA, Vikhlinin, A, Aird, KA, Allen, SW, Bautz, M, Bayliss, M, Bleem, LE, Bocquet, S, Brodwin, M, Carlstrom, JE, Chang, CL, Cho, HM, Clocchiatti, A, Crawford, TM, Crites, AT, de Haan, T, Dobbs, MA, Foley, RJ, Forman, WR, George, EM, Gladders, MD, Gonzalez, AH, Halverson, NW, Hlavacek-Larrondo, J, Holder, GP, Holzapfel, WL, Hrubes, JD, Jones, C, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Liu, J, Lueker, M, Luong-Van, D, Mantz, A, Marrone, DP, McMahon, JJ, Meyer, SS, Miller, ED, Mocanu, L, Mohr, JJ, Murray, SS, Padin, S, Pryke, C, Reichardt, CL, Rest, A, Ruhl, JE, Saliwanchik, BR, Saro, A, Sayre, JT, Schaffer, KK, Shirokoff, E, Spieler, HG, Stalder, B, Stanford, SA, Staniszewski, Z, Stark, AA, Story, KT, Stubbs, CW, Vanderlinde, K, Vieira, JD, Williamson, R, Zahn, O, Zenteno, A, McDonald, M, Benson, BA, Vikhlinin, A, Aird, KA, Allen, SW, Bautz, M, Bayliss, M, Bleem, LE, Bocquet, S, Brodwin, M, Carlstrom, JE, Chang, CL, Cho, HM, Clocchiatti, A, Crawford, TM, Crites, AT, de Haan, T, Dobbs, MA, Foley, RJ, Forman, WR, George, EM, Gladders, MD, Gonzalez, AH, Halverson, NW, Hlavacek-Larrondo, J, Holder, GP, Holzapfel, WL, Hrubes, JD, Jones, C, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Liu, J, Lueker, M, Luong-Van, D, Mantz, A, Marrone, DP, McMahon, JJ, Meyer, SS, Miller, ED, Mocanu, L, Mohr, JJ, Murray, SS, Padin, S, Pryke, C, Reichardt, CL, Rest, A, Ruhl, JE, Saliwanchik, BR, Saro, A, Sayre, JT, Schaffer, KK, Shirokoff, E, Spieler, HG, Stalder, B, Stanford, SA, Staniszewski, Z, Stark, AA, Story, KT, Stubbs, CW, Vanderlinde, K, Vieira, JD, Williamson, R, Zahn, O, and Zenteno, A

Published
2014

11. SPT-CL J2040-4451: AN SZ-SELECTED GALAXY CLUSTER AT z=1.478 WITH SIGNIFICANT ONGOING STAR FORMATION

Author

Bayliss, MB, Ashby, MLN, Ruel, J, Brodwin, M, Aird, KA, Bautz, MW, Benson, BA, Bleem, LE, Bocquet, S, Carlstrom, JE, Chang, CL, Cho, HM, Clocchiattii, A, Crawford, TM, Crites, AT, Desai, S, Dobbs, MA, Dudley, JP, Foley, RJ, Forman, WR, George, EM, Gettings, D, Gladders, MD, Gonzalez, AH, de Haan, T, Halverson, NW, High, FW, Holder, GP, Holzapfel, WL, Hoover, S, Hrubes, JD, Jones, C, Joy, M, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Liu, J, Lueker, M, Luong-Van, D, Mantz, A, Marrone, DP, Mawatari, K, McDonald, M, McMahon, JJ, Mehl, J, Meyer, SS, Miller, ED, Mocanu, L, Mohr, JJ, Montroy, TE, Murray, SS, Padin, S, Plagge, T, Pryke, C, Reichardt, CL, Rest, A, Ruhl, JE, Saliwanchik, BR, Saro, A, Sayre, JT, Schaffer, KK, Shirokoff, E, Song, J, Stalder, B, Suhada, R, Spieler, HG, Stanford, SA, Staniszewski, Z, Stark, AA, Story, K, Stubbs, CW, van Engelen, A, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, Zahn, R, Zenteno, A, Bayliss, MB, Ashby, MLN, Ruel, J, Brodwin, M, Aird, KA, Bautz, MW, Benson, BA, Bleem, LE, Bocquet, S, Carlstrom, JE, Chang, CL, Cho, HM, Clocchiattii, A, Crawford, TM, Crites, AT, Desai, S, Dobbs, MA, Dudley, JP, Foley, RJ, Forman, WR, George, EM, Gettings, D, Gladders, MD, Gonzalez, AH, de Haan, T, Halverson, NW, High, FW, Holder, GP, Holzapfel, WL, Hoover, S, Hrubes, JD, Jones, C, Joy, M, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Liu, J, Lueker, M, Luong-Van, D, Mantz, A, Marrone, DP, Mawatari, K, McDonald, M, McMahon, JJ, Mehl, J, Meyer, SS, Miller, ED, Mocanu, L, Mohr, JJ, Montroy, TE, Murray, SS, Padin, S, Plagge, T, Pryke, C, Reichardt, CL, Rest, A, Ruhl, JE, Saliwanchik, BR, Saro, A, Sayre, JT, Schaffer, KK, Shirokoff, E, Song, J, Stalder, B, Suhada, R, Spieler, HG, Stanford, SA, Staniszewski, Z, Stark, AA, Story, K, Stubbs, CW, van Engelen, A, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, Zahn, R, and Zenteno, A

Abstract

SPT-CLJ2040-4451 -- spectroscopically confirmed at z = 1.478 -- is the highest redshift galaxy cluster yet discovered via the Sunyaev-Zel'dovich effect. SPT-CLJ2040-4451 was a candidate galaxy cluster identified in the first 720 deg^2 of the South Pole Telescope Sunyaev-Zel'dovich (SPT-SZ) survey, and confirmed in follow-up imaging and spectroscopy. From multi-object spectroscopy with Magellan-I/Baade+IMACS we measure spectroscopic redshifts for 15 cluster member galaxies, all of which have strong [O II] 3727 emission. SPT-CLJ2040-4451 has an SZ-measured mass of M_500,SZ = 3.2 +/- 0.8 X 10^14 M_Sun/h_70, corresponding to M_200,SZ = 5.8 +/- 1.4 X 10^14 M_Sun/h_70. The velocity dispersion measured entirely from blue star forming members is sigma_v = 1500 +/- 520 km/s. The prevalence of star forming cluster members (galaxies with > 1.5 M_Sun/yr) implies that this massive, high-redshift cluster is experiencing a phase of active star formation, and supports recent results showing a marked increase in star formation occurring in galaxy clusters at z >1.4. We also compute the probability of finding a cluster as rare as this in the SPT-SZ survey to be >99%, indicating that its discovery is not in tension with the concordance Lambda-CDM cosmological model.

Published
2014

12. SPT-CL J0205-5829: A z=1.32 EVOLVED MASSIVE GALAXY CLUSTER IN THE SOUTH POLE TELESCOPE SUNYAEV-ZEL'DOVICH EFFECT SURVEY

Author

Stalder, B, Ruel, J, Suhada, R, Brodwin, M, Aird, KA, Andersson, K, Armstrong, R, Ashby, MLN, Bautz, M, Bayliss, M, Bazin, G, Benson, BA, Bleem, LE, Carlstrom, JE, Chang, CL, Cho, HM, Clocchiatti, A, Crawford, TM, Crites, AT, de Haan, T, Desai, S, Dobbs, MA, Dudley, JP, Foley, RJ, Forman, WR, George, EM, Gettings, D, Gladders, MD, Gonzalez, AH, Halverson, NW, Harrington, NL, High, FW, Holder, GP, Holzapfel, WL, Hoover, S, Hrubes, JD, Jones, C, Joy, M, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Liu, J, Lueker, M, Luong-Van, D, Mantz, A, Marrone, DP, McDonald, M, McMahon, JJ, Mehl, J, Meyer, SS, Mocanu, L, Mohr, JJ, Montroy, TE, Murray, SS, Natoli, T, Nurgaliev, D, Padin, S, Plagge, T, Pryke, C, Reichardt, CL, Rest, A, Ruhl, JE, Saliwanchik, BR, Saro, A, Sayre, JT, Schaffer, KK, Shaw, L, Shirokoff, E, Song, J, Spieler, HG, Stanford, SA, Staniszewski, Z, Stark, AA, Story, K, Stubbs, CW, van Engelen, A, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, Zahn, O, Zenteno, A, Stalder, B, Ruel, J, Suhada, R, Brodwin, M, Aird, KA, Andersson, K, Armstrong, R, Ashby, MLN, Bautz, M, Bayliss, M, Bazin, G, Benson, BA, Bleem, LE, Carlstrom, JE, Chang, CL, Cho, HM, Clocchiatti, A, Crawford, TM, Crites, AT, de Haan, T, Desai, S, Dobbs, MA, Dudley, JP, Foley, RJ, Forman, WR, George, EM, Gettings, D, Gladders, MD, Gonzalez, AH, Halverson, NW, Harrington, NL, High, FW, Holder, GP, Holzapfel, WL, Hoover, S, Hrubes, JD, Jones, C, Joy, M, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Liu, J, Lueker, M, Luong-Van, D, Mantz, A, Marrone, DP, McDonald, M, McMahon, JJ, Mehl, J, Meyer, SS, Mocanu, L, Mohr, JJ, Montroy, TE, Murray, SS, Natoli, T, Nurgaliev, D, Padin, S, Plagge, T, Pryke, C, Reichardt, CL, Rest, A, Ruhl, JE, Saliwanchik, BR, Saro, A, Sayre, JT, Schaffer, KK, Shaw, L, Shirokoff, E, Song, J, Spieler, HG, Stanford, SA, Staniszewski, Z, Stark, AA, Story, K, Stubbs, CW, van Engelen, A, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, Zahn, O, and Zenteno, A

Abstract

The galaxy cluster SPT-CL J0205-5829 currently has the highest spectroscopically-confirmed redshift, z=1.322, in the South Pole Telescope Sunyaev-Zel'dovich (SPT-SZ) survey. XMM-Newton observations measure a core-excluded temperature of Tx=8.7keV producing a mass estimate that is consistent with the Sunyaev-Zel'dovich derived mass. The combined SZ and X-ray mass estimate of M500=(4.9+/-0.8)e14 h_{70}^{-1} Msun makes it the most massive known SZ-selected galaxy cluster at z>1.2 and the second most massive at z>1. Using optical and infrared observations, we find that the brightest galaxies in SPT-CL J0205-5829 are already well evolved by the time the universe was <5 Gyr old, with stellar population ages >3 Gyr, and low rates of star formation (<0.5Msun/yr). We find that, despite the high redshift and mass, the existence of SPT-CL J0205-5829 is not surprising given a flat LambdaCDM cosmology with Gaussian initial perturbations. The a priori chance of finding a cluster of similar rarity (or rarer) in a survey the size of the 2500 deg^2 SPT-SZ survey is 69%.

Published
2013

13. COSMOLOGICAL CONSTRAINTS FROM SUNYAEV-ZEL'DOVICH-SELECTED CLUSTERS WITH X-RAY OBSERVATIONS IN THE FIRST 178 deg2 OF THE SOUTH POLE TELESCOPE SURVEY

Author

Benson, BA, de Haan, T, Dudley, JP, Reichardt, CL, Aird, KA, Andersson, K, Armstrong, R, Ashby, MLN, Bautz, M, Bayliss, M, Bazin, G, Bleem, LE, Brodwin, M, Carlstrom, JE, Chang, CL, Cho, HM, Clocchiatti, A, Crawford, TM, Crites, AT, Desai, S, Dobbs, MA, Foley, RJ, Forman, WR, George, EM, Gladders, MD, Gonzalez, AH, Halverson, NW, Harrington, N, High, FW, Holder, GP, Holzapfel, WL, Hoover, S, Hrubes, JD, Jones, C, Joy, M, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Liu, J, Lueker, M, Luong-Van, D, Mantz, A, Marrone, DP, McDonald, M, McMahon, JJ, Mehl, J, Meyer, SS, Mocanu, L, Mohr, JJ, Montroy, TE, Murray, SS, Natoli, T, Padin, S, Plagge, T, Pryke, C, Rest, A, Ruel, J, Ruhl, JE, Saliwanchik, BR, Saro, A, Sayre, JT, Schaffer, KK, Shaw, L, Shirokoff, E, Song, J, Spieler, HG, Stalder, B, Staniszewski, Z, Stark, AA, Story, K, Stubbs, CW, Suhada, R, van Engelen, A, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, Zahn, O, Zenteno, A, Benson, BA, de Haan, T, Dudley, JP, Reichardt, CL, Aird, KA, Andersson, K, Armstrong, R, Ashby, MLN, Bautz, M, Bayliss, M, Bazin, G, Bleem, LE, Brodwin, M, Carlstrom, JE, Chang, CL, Cho, HM, Clocchiatti, A, Crawford, TM, Crites, AT, Desai, S, Dobbs, MA, Foley, RJ, Forman, WR, George, EM, Gladders, MD, Gonzalez, AH, Halverson, NW, Harrington, N, High, FW, Holder, GP, Holzapfel, WL, Hoover, S, Hrubes, JD, Jones, C, Joy, M, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Liu, J, Lueker, M, Luong-Van, D, Mantz, A, Marrone, DP, McDonald, M, McMahon, JJ, Mehl, J, Meyer, SS, Mocanu, L, Mohr, JJ, Montroy, TE, Murray, SS, Natoli, T, Padin, S, Plagge, T, Pryke, C, Rest, A, Ruel, J, Ruhl, JE, Saliwanchik, BR, Saro, A, Sayre, JT, Schaffer, KK, Shaw, L, Shirokoff, E, Song, J, Spieler, HG, Stalder, B, Staniszewski, Z, Stark, AA, Story, K, Stubbs, CW, Suhada, R, van Engelen, A, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, Zahn, O, and Zenteno, A

Abstract

We use measurements from the South Pole Telescope (SPT) Sunyaev Zel'dovich (SZ) cluster survey in combination with X-ray measurements to constrain cosmological parameters. We present a statistical method that fits for the scaling relations of the SZ and X-ray cluster observables with mass while jointly fitting for cosmology. The method is generalizable to multiple cluster observables, and self-consistently accounts for the effects of the cluster selection and uncertainties in cluster mass calibration on the derived cosmological constraints. We apply this method to a data set consisting of an SZ-selected catalog of 18 galaxy clusters at z > 0.3 from the first 178 deg2 of the 2500 deg2 SPT-SZ survey, with 14 clusters having X-ray observations from either Chandra or XMM. Assuming a spatially flat LCDM cosmological model, we find the SPT cluster sample constrain sigma_8 (Omega_m/0.25)^0.30 = 0.785 +- 0.037. In combination with measurements of the CMB power spectrum from the SPT and the seven-year WMAP data, the SPT cluster sample constrain sigma_8 = 0.795 +- 0.016 and Omega_m = 0.255 +- 0.016, a factor of 1.5 improvement on each parameter over the CMB data alone. We consider several extensions beyond the LCDM model by including the following as free parameters: the dark energy equation of state (w), the sum of the neutrino masses (sum mnu), the effective number of relativistic species (Neff), and a primordial non-Gaussianity (fNL). We find that adding the SPT cluster data significantly improves the constraints on w and sum mnu beyond those found when using measurements of the CMB, supernovae, baryon acoustic oscillations, and the Hubble constant. Considering each extension independently, we best constrain w=-0.973 +- 0.063 and the sum of neutrino masses sum mnu < 0.28 eV at 95% confidence, a factor of 1.25 and 1.4 improvement, respectively, over the constraints without clusters. [abbrev.]

Published
2013

14. GALAXY CLUSTERS DISCOVERED VIA THE SUNYAEV-ZEL'DOVICH EFFECT IN THE FIRST 720 SQUARE DEGREES OF THE SOUTH POLE TELESCOPE SURVEY

Author

Reichardt, CL, Stalder, B, Bleem, LE, Montroy, TE, Aird, KA, Andersson, K, Armstrong, R, Ashby, MLN, Bautz, M, Bayliss, M, Bazin, G, Benson, BA, Brodwin, M, Carlstrom, JE, Chang, CL, Cho, HM, Clocchiatti, A, Crawford, TM, Crites, AT, de Haan, T, Desai, S, Dobbs, MA, Dudley, JP, Foley, RJ, Forman, WR, George, EM, Gladders, MD, Gonzalez, AH, Halverson, NW, Harrington, NL, High, FW, Holder, GP, Holzapfel, WL, Hoover, S, Hrubes, JD, Jones, C, Joy, M, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Liu, J, Lueker, M, Luong-Van, D, Mantz, A, Marrone, DP, McDonald, M, McMahon, JJ, Mehl, J, Meyer, SS, Mocanu, L, Mohr, JJ, Murray, SS, Natoli, T, Padin, S, Plagge, T, Pryke, C, Rest, A, Ruel, J, Ruhl, JE, Saliwanchik, BR, Saro, A, Sayre, JT, Schaffer, KK, Shaw, L, Shirokoff, E, Song, J, Spieler, HG, Staniszewski, Z, Stark, AA, Story, K, Stubbs, CW, Suhada, R, van Engelen, A, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, Zahn, O, Zenteno, A, Reichardt, CL, Stalder, B, Bleem, LE, Montroy, TE, Aird, KA, Andersson, K, Armstrong, R, Ashby, MLN, Bautz, M, Bayliss, M, Bazin, G, Benson, BA, Brodwin, M, Carlstrom, JE, Chang, CL, Cho, HM, Clocchiatti, A, Crawford, TM, Crites, AT, de Haan, T, Desai, S, Dobbs, MA, Dudley, JP, Foley, RJ, Forman, WR, George, EM, Gladders, MD, Gonzalez, AH, Halverson, NW, Harrington, NL, High, FW, Holder, GP, Holzapfel, WL, Hoover, S, Hrubes, JD, Jones, C, Joy, M, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Liu, J, Lueker, M, Luong-Van, D, Mantz, A, Marrone, DP, McDonald, M, McMahon, JJ, Mehl, J, Meyer, SS, Mocanu, L, Mohr, JJ, Murray, SS, Natoli, T, Padin, S, Plagge, T, Pryke, C, Rest, A, Ruel, J, Ruhl, JE, Saliwanchik, BR, Saro, A, Sayre, JT, Schaffer, KK, Shaw, L, Shirokoff, E, Song, J, Spieler, HG, Staniszewski, Z, Stark, AA, Story, K, Stubbs, CW, Suhada, R, van Engelen, A, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, Zahn, O, and Zenteno, A

Abstract

We present a catalog of 224 galaxy cluster candidates, selected through their Sunyaev-Zel'dovich (SZ) effect signature in the first 720 deg2 of the South Pole Telescope (SPT) survey. This area was mapped with the SPT in the 2008 and 2009 austral winters to a depth of 18 uK-arcmin at 150 GHz; 550 deg2 of it was also mapped to 44 uK-arcmin at 95 GHz. Based on optical imaging of all candidates and near-infrared imaging of the majority of candidates, we have found optical and/or infrared counterparts for 158 clusters. Of these, 135 were first identified as clusters in SPT data, including 117 new discoveries reported in this work. This catalog triples the number of confirmed galaxy clusters discovered through the SZ effect. We report photometrically derived (and in some cases spectroscopic) redshifts for confirmed clusters and redshift lower limits for the remaining candidates. The catalog extends to high redshift with a median redshift of z = 0.55 and maximum redshift of z = 1.37. Based on simulations, we expect the catalog to be nearly 100% complete above M500 ~ 5e14 Msun h_{70}^-1 at z > 0.6. There are 121 candidates detected at signal-to-noise greater than five, at which the catalog purity is measured to be 95%. From this high-purity subsample, we exclude the z < 0.3 clusters and use the remaining 100 candidates to improve cosmological constraints following the method presented by Benson et al., 2011. Adding the cluster data to CMB+BAO+H0 data leads to a preference for non-zero neutrino masses while only slightly reducing the upper limit on the sum of neutrino masses to sum mnu < 0.38 eV (95% CL). For a spatially flat wCDM cosmological model, the addition of this catalog to the CMB+BAO+H0+SNe results yields sigma8=0.807+-0.027 and w = -1.010+-0.058, improving the constraints on these parameters by a factor of 1.4 and 1.3, respectively. [abbrev]

Published
2013

15. X-RAY PROPERTIES OF THE FIRST SUNYAEV-ZEL'DOVICH EFFECT SELECTED GALAXY CLUSTER SAMPLE FROM THE SOUTH POLE TELESCOPE

Author

Andersson, K, Benson, BA, Ade, PAR, Aird, KA, Armstrong, B, Bautz, M, Bleem, LE, Brodwin, M, Carlstrom, JE, Chang, CL, Crawford, TM, Crites, AT, de Haan, T, Desai, S, Dobbs, MA, Dudley, JP, Foley, RJ, Forman, WR, Garmire, G, George, EM, Gladders, MD, Halverson, NW, High, FW, Holder, GP, Holzapfel, WL, Hrubes, JD, Jones, C, Joy, M, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Lueker, M, Marrone, DP, McMahon, JJ, Mehl, J, Meyer, SS, Mohr, JJ, Montroy, TE, Murray, SS, Padin, S, Plagge, T, Pryke, C, Reichardt, CL, Rest, A, Ruel, J, Ruhl, JE, Schaffer, KK, Shaw, L, Shirokoff, E, Song, J, Spieler, HG, Stalder, B, Staniszewski, Z, Stark, AA, Stubbs, CW, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, Yang, Y, Zahn, O, Zenteno, A, Andersson, K, Benson, BA, Ade, PAR, Aird, KA, Armstrong, B, Bautz, M, Bleem, LE, Brodwin, M, Carlstrom, JE, Chang, CL, Crawford, TM, Crites, AT, de Haan, T, Desai, S, Dobbs, MA, Dudley, JP, Foley, RJ, Forman, WR, Garmire, G, George, EM, Gladders, MD, Halverson, NW, High, FW, Holder, GP, Holzapfel, WL, Hrubes, JD, Jones, C, Joy, M, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Lueker, M, Marrone, DP, McMahon, JJ, Mehl, J, Meyer, SS, Mohr, JJ, Montroy, TE, Murray, SS, Padin, S, Plagge, T, Pryke, C, Reichardt, CL, Rest, A, Ruel, J, Ruhl, JE, Schaffer, KK, Shaw, L, Shirokoff, E, Song, J, Spieler, HG, Stalder, B, Staniszewski, Z, Stark, AA, Stubbs, CW, Vanderlinde, K, Vieira, JD, Vikhlinin, A, Williamson, R, Yang, Y, Zahn, O, and Zenteno, A

Abstract

We present results of X-ray observations of a sample of 15 clusters selected via their imprint on the cosmic microwave background (CMB) from the thermal Sunyaev-Zel'dovich (SZ) effect. These clusters are a subset of the first SZ-selected cluster catalog, obtained from observations of 178 deg^2 of sky surveyed by the South Pole Telescope. Using X-ray observations with Chandra and XMM-Newton, we estimate the temperature, T_X, and mass, M_g, of the intracluster medium (ICM) within r_500 for each cluster. From these, we calculate Y_X=M_g T_X and estimate the total cluster mass using a M_500-Y_X scaling relation measured from previous X-ray studies. The integrated Comptonization, Y_SZ, is derived from the SZ measurements, using additional information from the X-ray measured gas density profiles and a universal temperature profile. We calculate scaling relations between the X-ray and SZ observables, and find results generally consistent with other measurements and the expectations from simple self-similar behavior. Specifically, we fit a Y_SZ-Y_X relation and find a normalization of 0.82 +- 0.07, marginally consistent with the predicted ratio of Y_SZ/Y_X=0.91+-0.01 that would be expected from the density and temperature models used in this work. Using the Y_X derived mass estimates, we fit a Y_SZ-M_500 relation and find a slope consistent with the self-similar expectation of Y_SZ ~ M^5/3 with a normalization consistent with predictions from other X-ray studies. We compare the X-ray mass estimates to previously published SZ mass estimates derived from cosmological simulations of the SPT survey. We find that the SZ mass estimates are lower by a factor of 0.89+-0.06, which is within the ~15% systematic uncertainty quoted for the simulation-based SZ masses.

Published
2011

16. SOUTH POLE TELESCOPE DETECTIONS OF THE PREVIOUSLY UNCONFIRMED PLANCK EARLY SUNYAEV-ZEL'DOVICH CLUSTERS IN THE SOUTHERN HEMISPHERE

Author

Story, K, Aird, KA, Andersson, K, Armstrong, R, Bazin, G, Benson, BA, Bleem, LE, Bonamente, M, Brodwin, M, Carlstrom, JE, Chang, CL, Clocchiatti, A, Crawford, TM, Crites, AT, de Haan, T, Desai, S, Dobbs, MA, Dudley, JP, Foley, RJ, George, EM, Gladders, MD, Gonzalez, AH, Halverson, NW, High, FW, Holder, GP, Holzapfel, WL, Hoover, S, Hrubes, JD, Joy, M, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Lueker, M, Luong-Van, D, Marrone, DP, McMahon, JJ, Mehl, J, Meyer, SS, Mohr, JJ, Montroy, TE, Padin, S, Plagge, T, Pryke, C, Reichardt, CL, Rest, A, Ruel, J, Ruhl, JE, Saliwanchik, BR, Saro, A, Schaffer, KK, Shaw, L, Shirokoff, E, Song, J, Spieler, HG, Stalder, B, Staniszewski, Z, Stark, AA, Stubbs, CW, Vanderlinde, K, Vieira, JD, Williamson, R, Zenteno, A, Story, K, Aird, KA, Andersson, K, Armstrong, R, Bazin, G, Benson, BA, Bleem, LE, Bonamente, M, Brodwin, M, Carlstrom, JE, Chang, CL, Clocchiatti, A, Crawford, TM, Crites, AT, de Haan, T, Desai, S, Dobbs, MA, Dudley, JP, Foley, RJ, George, EM, Gladders, MD, Gonzalez, AH, Halverson, NW, High, FW, Holder, GP, Holzapfel, WL, Hoover, S, Hrubes, JD, Joy, M, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Lueker, M, Luong-Van, D, Marrone, DP, McMahon, JJ, Mehl, J, Meyer, SS, Mohr, JJ, Montroy, TE, Padin, S, Plagge, T, Pryke, C, Reichardt, CL, Rest, A, Ruel, J, Ruhl, JE, Saliwanchik, BR, Saro, A, Schaffer, KK, Shaw, L, Shirokoff, E, Song, J, Spieler, HG, Stalder, B, Staniszewski, Z, Stark, AA, Stubbs, CW, Vanderlinde, K, Vieira, JD, Williamson, R, and Zenteno, A

Abstract

We present South Pole Telescope (SPT) observations of the five galaxy cluster candidates in the southern hemisphere which were reported as unconfirmed in the Planck Early Sunyaev-Zel'dovich (ESZ) sample. One cluster candidate, PLCKESZ G255.62-46.16, is located in the 2500-square-degree SPT SZ survey region and was reported previously as SPT-CL J0411-4819. For the remaining four candidates, which are located outside of the SPT SZ survey region, we performed short, dedicated SPT observations. Each of these four candidates was strongly detected in maps made from these observations, with signal-to-noise ratios ranging from 6.3 to 13.8. We have observed these four candidates on the Magellan-Baade telescope and used these data to estimate cluster redshifts from the red sequence. Resulting redshifts range from 0.24 to 0.46. We report measurements of Y_0.75', the integrated Comptonization within a 0.75' radius, for all five candidates. We also report X-ray luminosities calculated from ROSAT All-Sky Survey catalog counts, as well as optical and improved SZ coordinates for each candidate. The combination of SPT SZ measurements, optical red-sequence measurements, and X-ray luminosity estimates demonstrates that these five Planck ESZ cluster candidates do indeed correspond to real galaxy clusters with redshifts and observable properties consistent with the rest of the ESZ sample.

Published
2011

17. OPTICAL REDSHIFT AND RICHNESS ESTIMATES FOR GALAXY CLUSTERS SELECTED WITH THE SUNYAEV-ZEL'DOVICH EFFECT FROM 2008 SOUTH POLE TELESCOPE OBSERVATIONS

Author

High, FW, Stalder, B, Song, J, Ade, PAR, Aird, KA, Allam, SS, Armstrong, R, Barkhouse, WA, Benson, BA, Bertin, E, Bhattacharya, S, Bleem, LE, Brodwin, M, Buckley-Geer, EJ, Carlstrom, JE, Challis, P, Chang, CL, Crawford, TM, Crites, AT, de Haan, T, Desai, S, Dobbs, MA, Dudley, JP, Foley, RJ, George, EM, Gladders, M, Halverson, NW, Hamuy, M, Hansen, SM, Holder, GP, Holzapfel, WL, Hrubes, JD, Joy, M, Keisler, R, Lee, AT, Leitch, EM, Lin, H, Lin, Y-T, Loehr, A, Lueker, M, Marrone, D, McMahon, JJ, Mehl, J, Meyer, SS, Mohr, JJ, Montroy, TE, Morell, N, Ngeow, C-C, Padin, S, Plagge, T, Pryke, C, Reichardt, CL, Rest, A, Ruel, J, Ruhl, JE, Schaffer, KK, Shaw, L, Shirokoff, E, Smith, RC, Spieler, HG, Staniszewski, Z, Stark, AA, Stubbs, CW, Tucker, DL, Vanderlinde, K, Vieira, JD, Williamson, R, Wood-Vasey, WM, Yang, Y, Zahn, O, Zenteno, A, High, FW, Stalder, B, Song, J, Ade, PAR, Aird, KA, Allam, SS, Armstrong, R, Barkhouse, WA, Benson, BA, Bertin, E, Bhattacharya, S, Bleem, LE, Brodwin, M, Buckley-Geer, EJ, Carlstrom, JE, Challis, P, Chang, CL, Crawford, TM, Crites, AT, de Haan, T, Desai, S, Dobbs, MA, Dudley, JP, Foley, RJ, George, EM, Gladders, M, Halverson, NW, Hamuy, M, Hansen, SM, Holder, GP, Holzapfel, WL, Hrubes, JD, Joy, M, Keisler, R, Lee, AT, Leitch, EM, Lin, H, Lin, Y-T, Loehr, A, Lueker, M, Marrone, D, McMahon, JJ, Mehl, J, Meyer, SS, Mohr, JJ, Montroy, TE, Morell, N, Ngeow, C-C, Padin, S, Plagge, T, Pryke, C, Reichardt, CL, Rest, A, Ruel, J, Ruhl, JE, Schaffer, KK, Shaw, L, Shirokoff, E, Smith, RC, Spieler, HG, Staniszewski, Z, Stark, AA, Stubbs, CW, Tucker, DL, Vanderlinde, K, Vieira, JD, Williamson, R, Wood-Vasey, WM, Yang, Y, Zahn, O, and Zenteno, A

Abstract

We present redshifts and optical richness properties of 21 galaxy clusters uniformly selected by their Sunyaev-Zel'dovich signature. These clusters, plus an additional, unconfirmed candidate, were detected in a 178 square-degree area surveyed by the South Pole Telescope in 2008. Using griz imaging from the Blanco Cosmology Survey and from pointed Magellan telescope observations, as well as spectroscopy using Magellan facilities, we confirm the existence of clustered red-sequence galaxies, report red-sequence photometric redshifts, present spectroscopic redshifts for a subsample, and derive R_200 radii and M_200 masses from optical richness. The clusters span redshifts from 0.15 to greater than 1, with a median redshift of 0.74; three clusters are estimated to be at z > 1. Redshifts inferred from mean red-sequence colors exhibit 2% RMS scatter in sigma_z/(1+z) with respect to the spectroscopic subsample for z < 1. We show that M_200 cluster masses derived from optical richness correlate with masses derived from South Pole Telescope data and agree with previously derived scaling relations to within the uncertainties. Optical and infrared imaging is an efficient means of cluster identification and redshift estimation in large Sunyaev-Zel'dovich surveys, and exploiting the same data for richness measurements, as we have done, will be useful for constraining cluster masses and radii for large samples in cosmological analysis.

Published
2010

18. EXTRAGALACTIC MILLIMETER-WAVE SOURCES IN SOUTH POLE TELESCOPE SURVEY DATA: SOURCE COUNTS, CATALOG, AND STATISTICS FOR AN 87 SQUARE-DEGREE FIELD

Author

Vieira, JD, Crawford, TM, Switzer, ER, Ade, PAR, Aird, KA, Ashby, MLN, Benson, BA, Bleem, LE, Brodwin, M, Carlstrom, JE, Chang, CL, Cho, H-M, Crites, AT, de Haan, T, Dobbs, MA, Everett, W, George, EM, Gladders, M, Hall, NR, Halverson, NW, High, FW, Holder, GP, Holzapfel, WL, Hrubes, JD, Joy, M, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Lueker, M, Marrone, DP, McIntyre, V, McMahon, JJ, Mehl, J, Meyer, SS, Mohr, JJ, Montroy, TE, Padin, S, Plagge, T, Pryke, C, Reichardt, CL, Ruhl, JE, Schaffer, KK, Shaw, L, Shirokoff, E, Spieler, HG, Stalder, B, Staniszewski, Z, Stark, AA, Vanderlinde, K, Walsh, W, Williamson, R, Yang, Y, Zahn, O, Zenteno, A, Vieira, JD, Crawford, TM, Switzer, ER, Ade, PAR, Aird, KA, Ashby, MLN, Benson, BA, Bleem, LE, Brodwin, M, Carlstrom, JE, Chang, CL, Cho, H-M, Crites, AT, de Haan, T, Dobbs, MA, Everett, W, George, EM, Gladders, M, Hall, NR, Halverson, NW, High, FW, Holder, GP, Holzapfel, WL, Hrubes, JD, Joy, M, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Lueker, M, Marrone, DP, McIntyre, V, McMahon, JJ, Mehl, J, Meyer, SS, Mohr, JJ, Montroy, TE, Padin, S, Plagge, T, Pryke, C, Reichardt, CL, Ruhl, JE, Schaffer, KK, Shaw, L, Shirokoff, E, Spieler, HG, Stalder, B, Staniszewski, Z, Stark, AA, Vanderlinde, K, Walsh, W, Williamson, R, Yang, Y, Zahn, O, and Zenteno, A

Abstract

We report the results of an 87 square-degree point-source survey centered at R.A. 5h30m, decl. -55 deg. taken with the South Pole Telescope (SPT) at 1.4 and 2.0 mm wavelengths with arc-minute resolution and milli-Jansky depth. Based on the ratio of flux in the two bands, we separate the detected sources into two populations, one consistent with synchrotron emission from active galactic nuclei (AGN) and one consistent with thermal emission from dust. We present source counts for each population from 11 to 640 mJy at 1.4 mm and from 4.4 to 800 mJy at 2.0 mm. The 2.0 mm counts are dominated by synchrotron-dominated sources across our reported flux range; the 1.4 mm counts are dominated by synchroton-dominated sources above ~15 mJy and by dust-dominated sources below that flux level. We detect 141 synchrotron-dominated sources and 47 dust-dominated sources at S/N > 4.5 in at least one band. All of the most significantly detected members of the synchrotron-dominated population are associated with sources in previously published radio catalogs. Some of the dust-dominated sources are associated with nearby (z << 1) galaxies whose dust emission is also detected by the Infrared Astronomy Satellite (IRAS). However, most of the bright, dust-dominated sources have no counterparts in any existing catalogs. We argue that these sources represent the rarest and brightest members of the population commonly referred to as sub-millimeter galaxies (SMGs). Because these sources are selected at longer wavelengths than in typical SMG surveys, they are expected to have a higher mean redshift distribution and may provide a new window on galaxy formation in the early universe.

Published
2010

19. MEASUREMENTS OF SECONDARY COSMIC MICROWAVE BACKGROUND ANISOTROPIES WITH THE SOUTH POLE TELESCOPE

Author

Lueker, M, Reichardt, CL, Schaffer, KK, Zahn, O, Ade, PAR, Aird, KA, Benson, BA, Bleem, LE, Carlstrom, JE, Chang, CL, Cho, H-M, Crawford, TM, Crites, AT, de Haan, T, Dobbs, MA, George, EM, Hall, NR, Halverson, NW, Holder, GP, Holzapfel, WL, Hrubes, JD, Joy, M, Keisler, R, Knox, L, Lee, AT, Leitch, EM, McMahon, JJ, Mehl, J, Meyer, SS, Mohr, JJ, Montroy, TE, Padin, S, Plagge, T, Pryke, C, Ruhl, JE, Shaw, L, Shirokoff, E, Spieler, HG, Stalder, B, Staniszewski, Z, Stark, AA, Vanderlinde, K, Vieira, JD, Williamson, R, Lueker, M, Reichardt, CL, Schaffer, KK, Zahn, O, Ade, PAR, Aird, KA, Benson, BA, Bleem, LE, Carlstrom, JE, Chang, CL, Cho, H-M, Crawford, TM, Crites, AT, de Haan, T, Dobbs, MA, George, EM, Hall, NR, Halverson, NW, Holder, GP, Holzapfel, WL, Hrubes, JD, Joy, M, Keisler, R, Knox, L, Lee, AT, Leitch, EM, McMahon, JJ, Mehl, J, Meyer, SS, Mohr, JJ, Montroy, TE, Padin, S, Plagge, T, Pryke, C, Ruhl, JE, Shaw, L, Shirokoff, E, Spieler, HG, Stalder, B, Staniszewski, Z, Stark, AA, Vanderlinde, K, Vieira, JD, and Williamson, R

Abstract

We report cosmic microwave background (CMB) power spectrum measurements from the first 100 sq. deg. field observed by the South Pole Telescope (SPT) at 150 and 220 GHz. On angular scales where the primary CMB anisotropy is dominant, ell ~< 3000, the SPT power spectrum is consistent with the standard LambdaCDM cosmology. On smaller scales, we see strong evidence for a point source contribution, consistent with a population of dusty, star-forming galaxies. After we mask bright point sources, anisotropy power on angular scales of 3000 < ell < 9500 is detected with a signal-to-noise > 50 at both frequencies. We combine the 150 and 220 GHz data to remove the majority of the point source power, and use the point source subtracted spectrum to detect Sunyaev-Zel'dovich (SZ) power at 2.6 sigma. At ell=3000, the SZ power in the subtracted bandpowers is 4.2 +/- 1.5 uK^2, which is significantly lower than the power predicted by a fiducial model using WMAP5 cosmological parameters. This discrepancy may suggest that contemporary galaxy cluster models overestimate the thermal pressure of intracluster gas. Alternatively, this result can be interpreted as evidence for lower values of sigma8. When combined with an estimate of the kinetic SZ contribution, the measured SZ amplitude shifts sigma8 from the primary CMB anisotropy derived constraint of 0.794 +/- 0.028 down to 0.773 +/- 0.025. The uncertainty in the constraint on sigma8 from this analysis is dominated by uncertainties in the theoretical modeling required to predict the amplitude of the SZ power spectrum for a given set of cosmological parameters.

Published
2010

20. ANGULAR POWER SPECTRA OF THE MILLIMETER-WAVELENGTH BACKGROUND LIGHT FROM DUSTY STAR-FORMING GALAXIES WITH THE SOUTH POLE TELESCOPE

Author

Hall, NR, Keisler, R, Knox, L, Reichardt, CL, Ade, PAR, Aird, KA, Benson, BA, Bleem, LE, Carlstrom, JE, Chang, CL, Cho, H-M, Crawford, TM, Crites, AT, De Haan, T, Dobbs, MA, George, EM, Halverson, NW, Holder, GP, Holzapfel, WL, Hrubes, JD, Joy, M, Lee, AT, Leitch, EM, Lueker, M, McMahon, JJ, Mehl, J, Meyer, SS, Mohr, JJ, Montroy, TE, Padin, S, Plagge, T, Pryke, C, Ruhl, JE, Schaffer, KK, Shaw, L, Shirokoff, E, Spieler, HG, Stalder, B, Staniszewski, Z, Stark, AA, Switzer, ER, Vanderlinde, K, Vieira, JD, Williamson, R, Zahn, O, Hall, NR, Keisler, R, Knox, L, Reichardt, CL, Ade, PAR, Aird, KA, Benson, BA, Bleem, LE, Carlstrom, JE, Chang, CL, Cho, H-M, Crawford, TM, Crites, AT, De Haan, T, Dobbs, MA, George, EM, Halverson, NW, Holder, GP, Holzapfel, WL, Hrubes, JD, Joy, M, Lee, AT, Leitch, EM, Lueker, M, McMahon, JJ, Mehl, J, Meyer, SS, Mohr, JJ, Montroy, TE, Padin, S, Plagge, T, Pryke, C, Ruhl, JE, Schaffer, KK, Shaw, L, Shirokoff, E, Spieler, HG, Stalder, B, Staniszewski, Z, Stark, AA, Switzer, ER, Vanderlinde, K, Vieira, JD, Williamson, R, and Zahn, O

Abstract

We use data from the first 100 square-degree field observed by the South Pole Telescope (SPT) in 2008 to measure the angular power spectrum of temperature anisotropies contributed by the background of dusty star-forming galaxies (DSFGs) at millimeter wavelengths. From the auto and cross-correlation of 150 and 220 GHz SPT maps, we significantly detect both Poisson distributed and, for the first time at millimeter wavelengths, clustered components of power from a background of DSFGs. The spectral indices between 150 and 220 GHz of the Poisson and clustered components are found to be 3.86 +- 0.23 and 3.8 +- 1.3 respectively, implying a steep scaling of the dust emissivity index beta ~ 2. The Poisson and clustered power detected in SPT, BLAST (at 600, 860, and 1200 GHz), and Spitzer (1900 GHz) data can be understood in the context of a simple model in which all galaxies have the same graybody spectrum with dust emissivity index of beta = 2 and dust temperature T_d = 34 K. In this model, half of the 150 GHz background light comes from redshifts greater than 3.2. We also use the SPT data to place an upper limit on the amplitude of the kinetic Sunyaev-Zel'dovich power spectrum at l = 3000 of 13 uK^2 at 95% confidence.

Published
2010

21. GALAXY CLUSTERS SELECTED WITH THE SUNYAEV-ZEL'DOVICH EFFECT FROM 2008 SOUTH POLE TELESCOPE OBSERVATIONS

Author

Vanderlinde, K, Crawford, TM, de Haan, T, Dudley, JP, Shaw, L, Ade, PAR, Aird, KA, Benson, BA, Bleem, LE, Brodwin, M, Carlstrom, JE, Chang, CL, Crites, AT, Desai, S, Dobbs, MA, Foley, RJ, George, EM, Gladders, MD, Hall, NR, Halverson, NW, High, FW, Holder, GP, Holzapfel, WL, Hrubes, JD, Joy, M, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Loehr, A, Lueker, M, Marrone, DP, McMahon, JJ, Mehl, J, Meyer, SS, Mohr, JJ, Montroy, TE, Ngeow, C-C, Padin, S, Plagge, T, Pryke, C, Reichardt, CL, Rest, A, Ruel, J, Ruhl, JE, Schaffer, KK, Shirokoff, E, Song, J, Spieler, HG, Stalder, B, Staniszewski, Z, Stark, AA, Stubbs, CW, van Engelen, A, Vieira, JD, Williamson, R, Yang, Y, Zahn, O, Zenteno, A, Vanderlinde, K, Crawford, TM, de Haan, T, Dudley, JP, Shaw, L, Ade, PAR, Aird, KA, Benson, BA, Bleem, LE, Brodwin, M, Carlstrom, JE, Chang, CL, Crites, AT, Desai, S, Dobbs, MA, Foley, RJ, George, EM, Gladders, MD, Hall, NR, Halverson, NW, High, FW, Holder, GP, Holzapfel, WL, Hrubes, JD, Joy, M, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Loehr, A, Lueker, M, Marrone, DP, McMahon, JJ, Mehl, J, Meyer, SS, Mohr, JJ, Montroy, TE, Ngeow, C-C, Padin, S, Plagge, T, Pryke, C, Reichardt, CL, Rest, A, Ruel, J, Ruhl, JE, Schaffer, KK, Shirokoff, E, Song, J, Spieler, HG, Stalder, B, Staniszewski, Z, Stark, AA, Stubbs, CW, van Engelen, A, Vieira, JD, Williamson, R, Yang, Y, Zahn, O, and Zenteno, A

Abstract

We present a detection-significance-limited catalog of 21 Sunyaev-Zel'dovich selected galaxy clusters. These clusters, along with 1 unconfirmed candidate, were identified in 178 deg^2 of sky surveyed in 2008 by the South Pole Telescope to a depth of 18 uK-arcmin at 150 GHz. Optical imaging from the Blanco Cosmology Survey (BCS) and Magellan telescopes provided photometric (and in some cases spectroscopic) redshift estimates, with catalog redshifts ranging from z=0.15 to z>1, with a median z = 0.74. Of the 21 confirmed galaxy clusters, three were previously identified as Abell clusters, three were presented as SPT discoveries in Staniszewski et al, 2009, and three were first identified in a recent analysis of BCS data by Menanteau et al, 2010; the remaining 12 clusters are presented for the first time in this work. Simulated observations of the SPT fields predict the sample to be nearly 100% complete above a mass threshold of M_200 ~ 5x10^14 M_sun/h at z = 0.6. This completeness threshold pushes to lower mass with increasing redshift, dropping to ~4x10^14 M_sun/h at z=1. The size and redshift distribution of this catalog are in good agreement with expectations based on our current understanding of galaxy clusters and cosmology. In combination with other cosmological probes, we use the cluster catalog to improve estimates of cosmological parameters. Assuming a standard spatially flat wCDM cosmological model, the addition of our catalog to the WMAP 7-year analysis yields sigma_8 = 0.81 +- 0.09 and w = -1.07 +- 0.29, a ~50% improvement in precision on both parameters over WMAP7 alone.

Published
2010

Catalog

Books, media, physical & digital resources
See catalog results