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Merging Cluster Collaboration: A Panchromatic Atlas of Radio Relic Mergers

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  • Nathan Golovich
  • William A. Dawson
  • David M. Wittman
  • Reinout J. van Weeren
  • Felipe Andrade-Santos
  • M. James Jee
  • Bryant Benson
  • Francesco de Gasperin
  • Tiziana Venturi
  • Annalisa Bonafede
  • David Sobral
  • Georgiana A. Ogrean
  • Brian C. Lemaux
  • Maruša Bradač
  • Marcus Brüggen
  • Annika H. G. Peter
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Article number69
<mark>Journal publication date</mark>4/09/2019
<mark>Journal</mark>The Astrophysical Journal
Issue number1
Volume882
Number of pages70
Publication StatusPublished
<mark>Original language</mark>English

Abstract

Golovich et al. 2017b presents 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 three dimensional relative velocity (usually $`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.

Bibliographic note

71 pages, 42 figures, accepted to ApJ