Merging Cluster Collaboration: A Panchromatic Atlas of Radio Relic Mergers

被引:48
作者
Golovich, N. [1 ,2 ]
Dawson, W. A. [1 ]
Wittman, D. M. [2 ,3 ]
van Weeren, R. J. [4 ,5 ]
Andrade-Santos, F. [4 ]
Jee, M. J. [2 ,6 ]
Benson, B. [2 ]
de Gasperin, F. [5 ,7 ]
Venturi, T. [8 ]
Bonafede, A. [8 ,9 ]
Sobral, D. [5 ,10 ]
Ogrean, G. A. [11 ]
Lemaux, B. C. [2 ]
Bradac, M. [2 ]
Brueggen, M. [7 ]
Peter, A. [12 ,13 ,14 ]
机构
[1] Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA
[2] Univ Calif Davis, Dept Phys, One Shields Ave, Davis, CA 95616 USA
[3] Univ Lisbon, Inst Astrofis & Ciencias Espaco, Lisbon, Portugal
[4] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
[5] Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
[6] Yonsei Univ, Dept Astron, 50 Yonsei Ro, Seoul, South Korea
[7] Univ Hamburg, Hamburger Sternwarte, D-21029 Hamburg, Germany
[8] Univ Bologna, Dipartimento Fis & Astron, Via P Gobetti 93-2, I-40129 Bologna, Italy
[9] INAF Ist Radioastron, Via P Gobetti 101, I-40129 Bologna, Italy
[10] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England
[11] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, 452 Lomita Mall, Stanford, CA 94305 USA
[12] Ohio State Univ, Dept Astron, 140 W 18th Ave, Columbus, OH 43210 USA
[13] Ohio State Univ, Ctr Cosmol & AstroParticle Phys, 191 W Woodruff Ave, Columbus, OH 43210 USA
[14] Ohio State Univ, Dept Phys, 191 W Woodruff Ave, Columbus, OH 43210 USA
基金
美国国家科学基金会; 新加坡国家研究基金会; 美国国家航空航天局;
关键词
galaxies: clusters: general; galaxies: clusters: intracluster medium; radio continuum: general; X-rays: galaxies: clusters; HUBBLE-FRONTIER-FIELDS; INTERACTION CROSS-SECTION; MATTER SELF-INTERACTIONS; MASSIVE GALAXY CLUSTERS; SHEAR-SELECTED CLUSTERS; XMM-NEWTON OBSERVATIONS; STRONG-LENSING ANALYSIS; X-RAY OBSERVATIONS; DARK-MATTER; STAR-FORMATION;
D O I
10.3847/1538-4357/ab2f90
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Golovich et al. present an optical imaging and spectroscopic survey of 29 radio relic merging galaxy clusters. In this paper, we study this survey to identify substructure and quantify the dynamics of the mergers. Using a combined photometric and spectroscopic approach, we identify the minimum number of substructures in each system to describe the galaxy populations and estimate the line-of-sight velocity difference between likely merging subclusters. We find that the line-of-sight velocity components of the mergers are typically small compared with the maximum 3D relative velocity (usually <1000 km s(-1) and often consistent with zero). We also compare our systems to n-body simulation analogs and estimate the viewing angle of the clean mergers in our ensemble. We find that the median system's separation vector lies within 40 degrees (17 degrees) at a 90% (50%) confidence level. This suggests that the merger axes of these systems are generally in or near the plane of the sky, matching findings in magnetohydrodynamical simulations. In 28 of the 29 systems we identify substructures in the galaxy population aligned with the radio relic(s) and presumed associated merger-induced shock. From this ensemble, we identify eight systems to include in a "gold" sample that is prime for further observation, modeling, and simulation study. Additional papers will present weak-lensing mass maps and dynamical modeling for each merging system, ultimately leading to new insight into a wide range of astrophysical phenomena at some of the largest scales in the universe.
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