TY - JOUR
T1 - Exemplary merging clusters
T2 - Weak-lensing and X-ray analysis of the double radio relic, merging galaxy clusters MACS J1752.0+4440 and ZWCL 1856.8+6616
AU - Finner, Kyle
AU - HyeongHan, Kim
AU - Jee, M. James
AU - Wittman, David
AU - Forman, William R.
AU - van Weeren, Reinout J.
AU - Golovich, Nathan R.
AU - Dawson, William A.
AU - Jones, Alexander
AU - de Gasperin, Francesco
AU - Jones, Christine
N1 - Publisher Copyright:
© 2021. The American Astronomical Society. All rights reserved.
PY - 2021/9/10
Y1 - 2021/9/10
N2 - The investigation of merging galaxy clusters that exhibit radio relics is strengthening our understanding of the formation and evolution of galaxy clusters, the nature of dark matter, the intracluster medium, and astrophysical particle acceleration. Each merging cluster provides only a single view of the cluster formation process, and the variety of merging clusters is vast. Clusters hosting double radio relics are rare and extremely important because they allow tight constraints on the merger scenario. We present a weak-lensing and X-ray analysis of MACS J1752.0+4440 (z = 0.365) and ZWCL 1856.8+6616 (z = 0.304), two double radio relic clusters. Our weak-lensing mass estimates show that each cluster is a major merger with approximately 1:1 mass ratio. The total mass of MACS J1752.0+4440 (ZWCL 1856.8+6616) is M200 = 14.7-+3.33.8 ´ 1014 Me (M200 = 2.4-+0.70.9 ´ 1014 Me). We find that these two clusters have comparable features in their weak-lensing and gas distributions, even though the systems have vastly different total masses. From the likeness of the X-ray morphologies and the remarkable symmetry of the radio relics, we propose that both systems underwent nearly head-on collisions. However, revelations from the hot-gas features and our multiwavelength data analysis suggest that ZWCL 1856.8+6618 is likely at a later merger phase than MACS J1752.0+4440. We postulate that the SW radio relic in MACS J1752.0 +4440 is a result of particle reacceleration.
AB - The investigation of merging galaxy clusters that exhibit radio relics is strengthening our understanding of the formation and evolution of galaxy clusters, the nature of dark matter, the intracluster medium, and astrophysical particle acceleration. Each merging cluster provides only a single view of the cluster formation process, and the variety of merging clusters is vast. Clusters hosting double radio relics are rare and extremely important because they allow tight constraints on the merger scenario. We present a weak-lensing and X-ray analysis of MACS J1752.0+4440 (z = 0.365) and ZWCL 1856.8+6616 (z = 0.304), two double radio relic clusters. Our weak-lensing mass estimates show that each cluster is a major merger with approximately 1:1 mass ratio. The total mass of MACS J1752.0+4440 (ZWCL 1856.8+6616) is M200 = 14.7-+3.33.8 ´ 1014 Me (M200 = 2.4-+0.70.9 ´ 1014 Me). We find that these two clusters have comparable features in their weak-lensing and gas distributions, even though the systems have vastly different total masses. From the likeness of the X-ray morphologies and the remarkable symmetry of the radio relics, we propose that both systems underwent nearly head-on collisions. However, revelations from the hot-gas features and our multiwavelength data analysis suggest that ZWCL 1856.8+6618 is likely at a later merger phase than MACS J1752.0+4440. We postulate that the SW radio relic in MACS J1752.0 +4440 is a result of particle reacceleration.
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U2 - 10.3847/1538-4357/ac0d00
DO - 10.3847/1538-4357/ac0d00
M3 - Article
AN - SCOPUS:85115873337
SN - 0004-637X
VL - 918
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 72
ER -