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Cited by 47Galaxies: Formation, Evolution, PhenomenaStellar, planetary, and galactic studiesAstrophysical Phenomena and Observations

Merging Cluster Collaboration: Optical and Spectroscopic Survey of a Radio-selected Sample of 29 Merging Galaxy Clusters

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Golovich, N., Dawson, W. A., Wittman, D. M., Jee, M. J., Benson, B., Lemaux, B. C., van Weeren, R. J., Andrade-Santos, F. +6 more·2019·The Astrophysical Journal Supplement Series
DOI 10.3847/1538-4365/aaf88b
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Abstract

Multi-band photometric and multi-object spectroscopic surveys of merging galaxy clusters allow for the characterization of the distributions of constituent DM and galaxy populations, constraints on the dynamics of the merging subclusters, and an understanding of galaxy evolution of member galaxies. We present deep photometric observations from Subaru/SuprimeCam and a catalog of 4431 spectroscopic galaxies from Keck/DEIMOS observations of 29 merging galaxy clusters ranging in redshift from z = 0.07 to 0.55. The ensemble is compiled based on the presence of radio relics, which highlight cluster-scale collisionless shocks in the intracluster medium. Together with the spectroscopic and photometric information, the velocities, timescales, and geometries of the respective merging events may be tightly constrained. In this preliminary analysis, the velocity distributions of 28 of the 29 clusters are shown to be well fit by single Gaussians. This indicates that radio-relic mergers largely occur transverse to the line of sight and/or near-apocenter. In this paper, we present our optical and spectroscopic surveys, preliminary results, and a discussion of the value of radio-relic mergers for developing accurate dynamical models of each system.

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  • The symmetric geometry of systems hosting two relics on opposite sides indicates a nearly head-on binary merger viewed close to the plane of the sky.

    “Systems hosting two relics on opposite sides of the cluster are especially useful: the symmetric geometry indicates a nearly head-on binary merger viewed close to the plane of the sky (R. J. van Weeren et al. 2012;N. Golovich et al. 2019)”

    From A New Robust Constraint on the Self-interaction Cross Section of Dark Matter with Double Radio Relic Clusters (2026) · cites this paper as N. Golovich et al. 2019

    Section 2 (Radio-relic Sample; page unavailable) says radio-relic selection is biased toward mergers in the plane of the sky. Section 5.2 (Cluster Redshift Histograms; page unavailable) also treats that viewing angle as plausible, but says a merger near apocenter is another possible explanation. Neither passage establishes that two relics on opposite sides indicate a nearly head-on binary merger. (LLM, conf=0.84)

    Experimental — accuracy not yet measured

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Authors
Golovich, N., Dawson, W. A., Wittman, D. M., Jee, M. J., Benson, B., Lemaux, B. C., van Weeren, R. J., Andrade-Santos, F., Sobral, D., de Gasperin, F., Brüggen, M., Bradač, M., Finner, K., & Peter, A.
Affiliations
  • Lawrence Livermore National Laboratory (US)
  • University of Lisbon (PT)
  • Yonsei University (KR)
  • University of California, Davis (US)
  • Center for Astrophysics Harvard & Smithsonian (US)
  • Leiden University (NL)
  • Universität Hamburg (DE)
  • The Ohio State University (US)
Corresponding author
Golovich, N.
ORCID
Venue
The Astrophysical Journal Supplement Series
Publisher
American Astronomical Society
Published
2019-02-01
Volume
240
Issue
2
Pages
39
ISSN
  • 0067-0049 (ISSN-L)
  • 1538-4365
DOI
10.3847/1538-4365/aaf88b
OpenAlex
W2963787324
Cited by
47
References
0
Citations by year
2026: 3 · 2025: 4 · 2024: 7 · 2023: 3 · 2022: 8 · 2021: 6 · 2020: 4 · 2019: 10 · 2018: 2
FWCI
3.83
Type
journal article
Language
en
Open access
Licence
Locations
  • The Astrophysical Journal Supplement Series (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • Lancaster EPrints (Lancaster University) (submittedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
  • Leiden Repository (Leiden University) (submittedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
  • arXiv (Cornell University)
Funders
  • National Science Foundation (DE-AC52-07-NA27344, 0071048, 9214621, NAG W-2166, 1518246)
  • U.S. Department of Energy (DEAC5207NA27344, AC52‐07NA27344)
  • National Aeronautics and Space Administration (HST-GO-13343.001-A, DE-AC52-07NA27344, NAG W-2166)
  • Alfred P. Sloan Foundation (NAG W-2166, DE-AC52-07NA27344)
  • W. M. Keck Foundation
  • California Institute of Technology (NAG W-2166)
  • Space Telescope Science Institute (NAG W-2166)
  • National Astronomical Observatory of Japan
  • Office of Science (DE-AC52-07NA27344)
  • Jet Propulsion Laboratory
  • Science and Technology Facilities Council (ST/P00038X/1, ST/R000514/1)
  • Lawrence Livermore National Laboratory (DE‐AC5207NA27344, 07NA27344, DE-AC52, AC52-07NA27344)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysical Phenomena and Observations
Keywords
radio relics, intracluster medium, cluster mergers, cluster dynamics, dark matter distribution, galaxy populations, galaxy evolution, collisionless shocks, photometric surveys

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