WEAK-LENSING MASS MEASUREMENTS OF FIVE GALAXY CLUSTERS IN THE SOUTH POLE TELESCOPE SURVEY USING MAGELLAN/MEGACAM

被引：40

作者：

High, F. W. ^{[1
,2
]}

Hoekstra, H. ^{[3
]}

Leethochawalit, N. ^{[4
]}

de Haan, T. ^{[5
]}

Abramson, L. ^{[2
]}

Aird, K. A.

Armstrong, R. ^{[6
]}

Ashby, M. L. N. ^{[7
]}

Bautz, M. ^{[8
]}

Bayliss, M. ^{[9
]}

Bazin, G. ^{[10
,11
]}

Benson, B. A. ^{[1
,12
]}

Bleem, L. E. ^{[1
,4
]}

Brodwin, M. ^{[13
]}

Carlstrom, J. E. ^{[1
,2
,4
,12
,14
]}

Chang, C. L. ^{[1
,12
,14
]}

Cho, H. M. ^{[15
]}

Clocchiatti, A. ^{[16
]}

Conroy, M. ^{[7
]}

Crawford, T. M. ^{[1
,2
]}

Crites, A. T. ^{[1
,2
]}

Desai, S. ^{[10
,11
]}

Dobbs, M. A. ^{[5
]}

Dudley, J. P. ^{[5
]}

Foley, R. J. ^{[7
]}

Forman, W. R. ^{[7
]}

George, E. M. ^{[17
]}

Gladders, M. D. ^{[1
,2
]}

Gonzalez, A. H. ^{[18
]}

Halverson, N. W. ^{[19
,20
]}

Harrington, N. L. ^{[17
]}

Holder, G. P. ^{[5
]}

Holzapfel, W. L. ^{[17
]}

Hoover, S. ^{[1
,12
]}

Hrubes, J. D.

Jones, C. ^{[7
]}

Joy, M. ^{[21
]}

Keisler, R. ^{[1
,4
]}

Knox, L. ^{[22
]}

Lee, A. T. ^{[17
,23
]}

Leitch, E. M. ^{[1
,2
]}

Liu, J. ^{[10
,11
]}

Lueker, M. ^{[17
,24
]}

Luong-Van, D.

Mantz, A. ^{[1
]}

Marrone, D. P. ^{[25
]}

McDonald, M. ^{[8
]}

McMahon, J. J. ^{[1
,12
,26
]}

Mehl, J. ^{[1
,2
]}

Meyer, S. S. ^{[1
,2
,4
,12
]}

机构：

[1] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA

[2] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA

[3] Leiden Univ, Leiden Observ, Leiden, Netherlands

[4] Univ Chicago, Dept Phys, Chicago, IL 60637 USA

[5] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

[6] Univ Illinois, Natl Ctr Supercomp Applicat, Urbana, IL 61801 USA

[7] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[8] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA

[9] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[10] Univ Munich, Dept Phys, D-81679 Munich, Germany

[11] Excellence Cluster Universe, D-85748 Garching, Germany

[12] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[13] Univ Missouri, Dept Phys & Astron, Kansas City, MO 64110 USA

[14] Argonne Natl Lab, Argonne, IL 60439 USA

[15] NIST Quantum Devices Grp, Boulder, CO 80305 USA

[16] Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, Chile

[17] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[18] Univ Florida, Dept Astron, Gainesville, FL 32611 USA

[19] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[20] Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA

[21] NASA, Marshall Space Flight Ctr, Dept Space Sci, Huntsville, AL 35812 USA

[22] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

[23] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA 94720 USA

[24] CALTECH, Dept Astron, Pasadena, CA 91125 USA

[25] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA

[26] Univ Michigan, Dept Phys, Ann Arbor, MI USA

[27] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany

[28] Case Western Reserve Univ, Ctr Educ & Res Cosmol & Astrophys, Dept Phys, Cleveland, OH 44106 USA

[29] Univ Minnesota, Dept Phys, Minneapolis, MN 55455 USA

[30] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[31] Sch Art Inst Chicago, Liberal Arts Dept, Chicago, IL 60603 USA

[32] Yale Univ, Dept Phys, New Haven, CT 06520 USA

[33] Univ Bonn, Argelander Inst Astron, D-53121 Bonn, Germany

[34] Univ Calif Berkeley, Dept Phys, Berkeley Ctr Cosmol Phys, Berkeley, CA 94720 USA

[35] Lawrence Berkeley Natl Labs, Berkeley, CA 94720 USA

来源：

ASTROPHYSICAL JOURNAL | 2012年 / 758卷 / 01期

基金：

美国国家科学基金会;

关键词：

cosmology: observations; galaxies: clusters: individual; X-RAY-PROPERTIES; DARK-MATTER; PHOTOMETRIC REDSHIFTS; OBSERVED GROWTH; CONSTRAINTS; COSMOLOGY; CATALOG; SAMPLE; II; PRECISION;

D O I：

10.1088/0004-637X/758/1/68

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We use weak gravitational lensing to measure the masses of five galaxy clusters selected from the South Pole Telescope (SPT) survey, with the primary goal of comparing these with the SPT Sunyaev-Zel'dovich (SZ) and X-ray-based mass estimates. The clusters span redshifts 0.28 < z < 0.43 and have masses M-500 > 2 x 10(14) h(-1)M(circle dot), and three of the five clusters were discovered by the SPT survey. We observed the clusters in the g'r'i' passbands with the Megacam imager on the Magellan Clay 6.5 m telescope. We measure a mean ratio of weak-lensing (WL) aperture masses to inferred aperture masses from the SZ data, both within an aperture of R-500,R-SZ derived from the SZ mass, of 1.04 +/- 0.18. We measure a mean ratio of spherical WL masses evaluated at R-500,R-SZ to spherical SZ masses of 1.07 +/- 0.18, and a mean ratio of spherical WL masses evaluated at R-500,R-WL to spherical SZ masses of 1.10 +/- 0.24. We explore potential sources of systematic error in the mass comparisons and conclude that all are subdominant to the statistical uncertainty, with dominant terms being cluster concentration uncertainty and N-body simulation calibration bias. Expanding the sample of SPT clusters with WL observations has the potential to significantly improve the SPT cluster mass calibration and the resulting cosmological constraints from the SPT cluster survey. These are the first WL detections using Megacam on the Magellan Clay telescope.

引用

页数：22

共 47 条

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