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Cited by 10Galaxies: Formation, Evolution, PhenomenaGamma-ray bursts and supernovaeCosmology and Gravitation Theories

THE BURST CLUSTER: DARK MATTER IN A CLUSTER MERGER ASSOCIATED WITH THE SHORT GAMMA-RAY BURST, GRB 050509B

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Dahle, H., Sarazin, C. L., Lopez, L. A., Kouveliotou, C., Patel, S. K., Rol, E., van der Horst, A. J., Fynbo, J. +6 more·2013·The Astrophysical Journal
DOI 10.1088/0004-637x/772/1/23
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Abstract

We have identified a merging galaxy cluster with evidence of two distinct subclusters. The X-ray and optical data suggest that the subclusters are presently moving away from each other after closest approach. This cluster merger was discovered from observations of the first well-localized short-duration gamma-ray burst (GRB), GRB 050509B. The Swift /Burst Alert Telescope error position of the source is coincident with a cluster of galaxies ZwCl 1234.0+02916, while the subsequent Swift /X-Ray Telescope localization of the X-ray afterglow found the GRB coincident with 2MASX J12361286+2858580, a giant red elliptical galaxy in the cluster. Deep multi-epoch optical images were obtained in this field to constrain the evolution of the GRB afterglow, including a total of 27,480 s exposure in the F814W band with Hubble Space Telescope Advanced Camera for Surveys, among the deepest imaging ever obtained toward a known galaxy cluster in a single passband. We perform a weak gravitational lensing analysis based on these data, including mapping of the total mass distribution of the merger system with high spatial resolution. When combined with Chandra X-ray Observatory Advanced CCD Imaging Spectrometer and Swift /XRT observations, we are able to investigate the dynamical state of the merger to better understand the nature of the dark matter component. Our weak gravitational lensing measurements reveal a separation of the X-ray centroid of the western subcluster from the center of the mass and galaxy light distributions, which is somewhat similar to that of the famous "Bullet cluster," and we conclude that this "Burst cluster" adds another candidate to the previously known merger systems for determining the nature of dark matter, as well as for studying the environment of a short GRB. Finally, we discuss potential connections between the cluster dynamical state and/or matter composition, and compact object mergers, which is currently the leading model for the origin of short GRBs. We also present our results from a weak-lensing survey based on archival Very Large Telescope images in the areas of five other short GRBs, which do not provide any firm detections of mass concentrations representative of rich clusters.

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  • Dahle et al. (2013) do not list a value of δ_SI, but measurements of their map yield ≈10 kpc, close to the H15 value of 28 kpc.

    “Dahle et al. (2013) do not list a value of δ SI , but measurements of their map yield ≈10 kpc, close to the H15 value of 28 kpc.”

    From The Mismeasure of Mergers: Revised Limits on Self-interacting Dark Matter in Merging Galaxy Clusters (2018) · cites this paper as Dahle et al. (2013)

    Section 6.2 describes Figure 7 as showing X-ray, light, and mass contours, and reports that the western X-ray gas is displaced from the dominant galaxy. It does not give a δ_SI value or an approximately 10 kpc separation; that figure-based estimate is the citing authors’ own measurement. Nor does this paper establish the comparison with the H15 value of 28 kpc. (LLM, conf=0.78)

    Experimental — accuracy not yet measured

  • Dahle et al. (2013) lensing contours agree with H15 in showing each mass concentration slightly to the north and, in the east-west direction, slightly closer to the center of the system compared to the corresponding galaxies.

    “The Dahle et al. (2013) lensing contours (in red) agree with H15 in showing each mass concentration slightly to the north and, in the east-west direction, slightly closer to the center of the system compared to the corresponding galaxies.”

    From The Mismeasure of Mergers: Revised Limits on Self-interacting Dark Matter in Merging Galaxy Clusters (2018) · cites this paper as Dahle et al. (2013)

    Section 4.4 describes two weak-lensing mass peaks close to the corresponding galaxy-light concentrations, and the Figure 7 caption identifies contours for both mass and light. Our copy does not state that each mass peak lies north of its galaxies and closer to the system’s east–west center; Section 6.2 instead describes the mass as centered on the galaxies. It also does not address agreement with H15. (LLM, conf=0.79)

    Experimental — accuracy not yet measured

  • H15 put the mass concentration slightly farther north than Dahle et al. (2013), but this displacement is nearly perpendicular to the merger axis and so has little effect on δ_SI.

    “Although H15 put the mass concentration slightly farther north than do Dahle et al. (2013), this displacement is nearly perpendicular to the merger axis and so has little effect on δ SI .”

    From The Mismeasure of Mergers: Revised Limits on Self-interacting Dark Matter in Merging Galaxy Clusters (2018) · cites this paper as Dahle et al. (2013)

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Cited by

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Authors
Dahle, H., Sarazin, C. L., Lopez, L. A., Kouveliotou, C., Patel, S. K., Rol, E., van der Horst, A. J., Fynbo, J., Wijers, R. A. M. J., Burrows, D. N., Gehrels, N., Grupe, D., Ramirez-Ruiz, E., & Michałowski, M. J.
Affiliations
  • University of Oslo (NO)
  • University of Virginia (US)
  • Massachusetts Institute of Technology (US)
  • Marshall Space Flight Center (US)
  • Optical Sciences (United States) (US)
  • University of Amsterdam (NL)
  • University of Copenhagen (DK)
  • Pennsylvania State University (US)
  • Goddard Space Flight Center (US)
  • University of California, Santa Cruz (US)
Corresponding author
Dahle, H.
ORCID
Venue
The Astrophysical Journal
Publisher
American Astronomical Society
Published
2013-07-02
Volume
772
Issue
1
Pages
23
ISSN
  • 0004-637X (ISSN-L)
  • 1538-4357
DOI
10.1088/0004-637x/772/1/23
OpenAlex
W2160275344
Cited by
10
References
0
Citations by year
2026: 1 · 2020: 1 · 2018: 2 · 2016: 2 · 2014: 4
FWCI
1.02
Type
journal article
Language
en
Open access
Licence
Locations
  • The Astrophysical Journal (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • UvA-DARE (University of Amsterdam) (submittedVersion, other-oa)
  • DSpace@MIT (Massachusetts Institute of Technology) (submittedVersion, cc-by-nc)
  • Research at the University of Copenhagen (University of Copenhagen) (submittedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
  • arXiv (Cornell University)
Funders
  • National Aeronautics and Space Administration (HST-GO-12012.02-A, HST-GO-11679.01)
  • Oak Ridge Associated Universities
  • National Research Foundation
  • Danmarks Grundforskningsfond
  • Norges Forskningsråd
  • ASTRON
  • Marshall Space Flight Center
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Gamma-ray bursts and supernovae
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
Keywords
GRB 050509b, short gamma-ray bursts, cluster mergers, dark matter, weak gravitational lensing, Bullet Cluster, X-ray afterglow, cluster dynamical state, compact object mergers, cluster mass distribution

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