THREE-DIMENSIONAL MULTI-PROBE ANALYSIS OF THE GALAXY CLUSTER A1689

被引:58
作者
Umetsu, Keiichi [1 ]
Sereno, Mauro [2 ,3 ]
Medezinski, Elinor [4 ,5 ]
Nonino, Mario [6 ]
Mroczkowski, Tony [7 ]
Diego, Jose M. [8 ]
Ettori, Stefano [3 ,9 ]
Okabe, Nobuhiro [10 ,11 ]
Broadhurst, Tom [12 ]
Lemze, Doron [5 ]
机构
[1] Acad Sinica, Inst Astron & Astrophys, Taipei 10617, Taiwan
[2] Univ Bologna, Dipartimento Fis & Astron, Alma Mater Studiorum, I-40127 Bologna, Italy
[3] Osservatorio Astron Bologna, INAF, I-40127 Bologna, Italy
[4] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel
[5] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA
[6] Osserv Astron Trieste, INAF, I-34143 Trieste, Italy
[7] US Naval Res Lab, Washington, DC 20375 USA
[8] Inst Fis Cantabria UC CSIC, IFCA, E-39005 Santander, Spain
[9] Ist Nazl Fis Nucl, Sez Bologna, I-40127 Bologna, Italy
[10] Hiroshima Univ, Dept Phys Sci, Hiroshima 7398526, Japan
[11] Univ Tokyo, Kavli Inst Phys & Math Universe WPI, Todai Inst Adv Study, Kashiwa, Chiba 2778583, Japan
[12] Ikerbasque, Basque Fdn Sci, E-48011 Bilbao, Spain
基金
美国国家科学基金会;
关键词
cosmology: observations; dark matter; galaxies: clusters: individual (A1689); gravitational lensing: strong; gravitational lensing: weak; DARK-MATTER HALOS; WEAK LENSING ANALYSIS; CONCENTRATION-MASS RELATION; ZELDOVICH EFFECT OBSERVATIONS; DEEP ADVANCED CAMERA; X-RAY; SUNYAEV-ZELDOVICH; ABELL; 1689; INTRACLUSTER MEDIUM; GRAVITATIONAL DISTORTIONS;
D O I
10.1088/0004-637X/806/2/207
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We perform a three-dimensional multi-probe analysis of the rich galaxy cluster A1689, one of the most powerful known lenses on the sky, by combining improved weak-lensing data from new wide-field BVR(C)i'z' Subaru/Suprime-Cam observations with strong-lensing, X-ray, and Sunyaev-Zel'dovich effect (SZE) data sets. We reconstruct the projected matter distribution from a joint weak-lensing analysis of two-dimensional shear and azimuthally integrated magnification constraints, the combination of which allows us to break the mass-sheet degeneracy. The resulting mass distribution reveals elongation with an axis ratio of similar to 0.7 in projection, aligned well with the distributions of cluster galaxies and intracluster gas. When assuming a spherical halo, our full weak-lensing analysis yields a projected halo concentration of c(200c)(2D) = 8.9 +/- 1.1 (c(vir)(2D) similar to 11), consistent with and improved from earlier weak-lensing work. We find excellent consistency between independent weak and strong lensing in the region of overlap. In a parametric triaxial framework, we constrain the intrinsic structure and geometry of the matter and gas distributions, by combining weak/strong lensing and X-ray/SZE data with minimal geometric assumptions. We show that the data favor a triaxial geometry with minor-major axis ratio 0.39 +/- 0.15 and major axis closely aligned with the line of sight (22 degrees +/- 10 degrees). We obtain a halo mass M-200c (1.2 +/- 0.2) x 10(15) M-circle dot h(-1). and a halo concentration c(200c)= 8.4 +/- 1.3, which overlaps with the greater than or similar to 1 sigma tail of the predicted distribution. The shape of the gas is rounder than the underlying matter but quite elongated with minor-major axis ratio 0.60 +/- 0.14. The gas mass fraction within 0.9 Mpc is 10(-2)(+3)%, a typical value for high-mass clusters. The thermal gas pressure contributes to similar to 60% of the equilibrium pressure, indicating a significant level of non-thermal pressure support. When compared to Planck ' s hydrostatic mass estimate, our lensing measurements yield a spherical mass ratio of MPlanck/MGL= 0.70 +/- 0.15 and 0.58 +/- 0.10 with and without corrections for lensing projection effects, respectively.
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页数:27
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