MC 2: Subaru and Hubble Space Telescope Weak-lensing Analysis of the Double Radio Relic Galaxy Cluster PLCK G287.0+32.9
The second most significant detection of the Planck Sunyaev-Zel'dovich survey, PLCK G287.0+32.9 (z = 0.385), boasts two similarly bright radio relics and a radio halo. One radio relic is located $$\sim 400\,\mathrm{kpc}$$ NW of the X-ray peak and the other $$\sim 2.8$$ Mpc to the SE. This large difference suggests that a complex merging scenario is required. A key missing puzzle for the merging scenario reconstruction is the underlying dark matter distribution in high resolution. Here, we present a joint Subaru Telescope and Hubble Space Telescope weak-lensing analysis of the cluster. Our analysis shows that the mass distribution features four significant substructures. Of the substructures, a primary cluster of mass $${M}_{200{\rm{c}}}={1.59}_{-0.22}^{+0.25}\times {10}^{15}\ {h}_{70}^{-1}\ {M}_{\odot }$$ dominates the weak-lensing signal. This cluster is likely to be undergoing a merger with one (or more) subcluster whose mass is approximately a factor of 10 lower. One candidate is the subcluster of mass $${M}_{200{\rm{c}}}={1.16}_{-0.13}^{+0.15}\times {10}^{14}\ {h}_{70}^{-1}\ {M}_{\odot }$$ located $$\sim 400\,\mathrm{kpc}$$ to the SE. The location of this subcluster suggests that its interaction with the primary cluster could be the source of the NW radio relic. Another subcluster is detected $$\sim 2$$ Mpc to the SE of the X-ray peak with mass $${M}_{200{\rm{c}}}={1.68}_{-0.20}^{+0.22}\times {10}^{14}\ {h}_{70}^{-1}\ {M}_{\odot }$$. This SE subcluster is in the vicinity of the SE radio relic and may have created the SE radio relic during a past merger with the primary cluster. The fourth subcluster, $${M}_{200{\rm{c}}}={1.87}_{-0.22}^{+0.24}\times {10}^{14}\ {h}_{70}^{-1}\ {M}_{\odot }$$, is NW of the X-ray peak and beyond the NW radio relic.
- Authors:
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[1]
; [2]
; [3]
; [4]
; [5]
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- Yonsei Univ., Seoul (Korea). Dept. of Astronomy
- Yonsei Univ., Seoul (Korea). Dept. of Astronomy; Univ. of California, Davis, CA (United States). Dept. of Physics
- Univ. of California, Davis, CA (United States). Dept. of Physics; Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Univ. of California, Davis, CA (United States). Dept. of Physics
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., CA (United States). Dept. of Physics, KIPAC
- Space Telescope Science Inst., Baltimore, MD (United States)
- Univ. Observatory Munich, Munich (Germany); Max Planck Inst. for Extraterrestrial Physics, Garching (Germany)
- Publication Date:
- Report Number(s):
- LLNL-JRNL-744497
Journal ID: ISSN 1538-4357; TRN: US1800987
- Grant/Contract Number:
- AC02-76SF00515; 1518246; PF5-160138; NAS8-03060; AC52-07NA27344
- Type:
- Accepted Manuscript
- Journal Name:
- The Astrophysical Journal (Online)
- Additional Journal Information:
- Journal Name: The Astrophysical Journal (Online); Journal Volume: 851; Journal Issue: 1; Journal ID: ISSN 1538-4357
- Publisher:
- Institute of Physics (IOP)
- Research Org:
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org:
- USDOE; National Science Foundation (NSF); National Aeronautic and Space Administration (NASA)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; cosmology: observations; dark matter; galaxies: clusters: individual (PLCK G287.0+32.9); gravitational lensing: weak; X-rays: galaxies: clusters
- OSTI Identifier:
- 1417013
- Alternate Identifier(s):
- OSTI ID: 1430983