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Title: The Discovery of Lensed Radio and X-ray Sources Behind the Frontier Fields Cluster MACS J0717.5+3745 with the JVLA and Chandra

Journal Article · · The Astrophysical Journal (Online)
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  1. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States)
  2. Univ. of Hamburg (Germany). Hamburger Sternwarte
  3. Naval Research Lab. (NRL), Washington, DC (United States)
  4. Max Planck Society, Garching (Germany). Max Planck Inst. for Astrophysics; Space Research Inst., Moscow (Russia)
  5. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  6. Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy
  7. Princeton Univ., NJ (United States). Dept. of Astrophysical Sciences
  8. National Radio Astronomy Observatory, Charlottesville, VA (United States)
  9. Univ. of Oxford (United Kingdom). Dept. of Physics
  10. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States); Johns Hopkins Univ., Baltimore, MD (United States). Department of Physics and Astronomy
  11. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States); Univ. of Western Australia, Crawley WA (Australia). International Centre for Radio Astronomy Research (ICRAR)
  12. Univ. degli Studi di Ferrara (Italy). Dipartimento di Fisica e Scienze della Terra
  13. Univ. of Hull, Hull (United Kingdom). E.A. Milne Centre for Astrophysics, Dept. of Physics & Mathematics
  14. California Inst. of Technology (CalTech), Pasadena, CA (United States). Cahill Center for Astronomy and Astrophysics
  15. Academia Sinica, Taipei (Taiwan). Inst. of Astronomy and Astrophysics

We report on high-resolution JVLA and Chandra observations of the Hubble Space Telescope (HST) Frontier Cluster MACS J0717.5+3745. MACS J0717.5+3745 offers the largest contiguous magnified area of any known cluster, making it a promising target to search for lensed radio and X-ray sources. With the high-resolution 1.0–6.5 GHz JVLA imaging in A and B configuration, we detect a total of 51 compact radio sources within the area covered by the HST imaging. Within this sample, we find seven lensed sources with amplification factors larger than two. None of these sources are identified as multiply lensed. Based on the radio luminosities, the majority of these sources are likely star-forming galaxies with star-formation rates (SFRs) of 10–50 M yr-1 located at 1≲ z ≲ 2. Two of the lensed radio sources are also detected in the Chandra image of the cluster. These two sources are likely active galactic nuclei, given their 2–10 keV X-ray luminosities of ~ 1043-44 erg s-1. From the derived radio luminosity function, we find evidence for an increase in the number density of radio sources at 0.6 < z < 2.0, compared to a z < 0.3 sample. Lastly, our observations indicate that deep radio imaging of lensing clusters can be used to study star-forming galaxies, with SFRs as low as ~10M yr-1, at the peak of cosmic star formation history.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1430975
Report Number(s):
LLNL-JRNL-676771; TRN: US1803011
Journal Information:
The Astrophysical Journal (Online), Vol. 817, Issue 2; ISSN 1538-4357
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 18 works
Citation information provided by
Web of Science

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Cited By (13)

The case for electron re-acceleration at galaxy cluster shocks journal January 2017
Mapping the kinetic Sunyaev-Zel’dovich effect toward MACS J0717.5+3745 with NIKA journal February 2017
LOFAR discoveryof radio emission in MACS J0717.5+3745 journal May 2018
Globular cluster population of the HST Frontier Fields galaxy J07173724+3744224
  • Carlson, Nathan L.; Sultanova, Madina R.; Kalawila Vithanage, Sandanuwan P.
  • Monthly Notices of the Royal Astronomical Society, Vol. 480, Issue 2 https://doi.org/10.1093/mnras/sty1979
journal July 2018
Discovery of large-scale diffuse radio emission in low-mass galaxy cluster Abell 1931 journal April 2018
Chandra and JVLA Observations of HST Frontier Fields Cluster MACS J0717.5+3745 journal January 2017
MC 2 : Multiwavelength and Dynamical Analysis of the Merging Galaxy Cluster ZwCl 0008.8+5215: An Older and Less Massive Bullet Cluster journal March 2017
MC 2 : A Deeper Look at ZwCl 2341.1+0000 with Bayesian Galaxy Clustering and Weak Lensing Analyses journal May 2017
Merging Cluster Collaboration: A Panchromatic Atlas of Radio Relic Mergers journal September 2019
Anatomy of a Cooling Flow: The Feedback Response to Pure Cooling in the Core of the Phoenix Cluster journal October 2019
The Case for Electron Re-Acceleration at Galaxy Cluster Shocks text January 2017
Globular cluster population of the HST frontier fields galaxy J07173724+3744224 text January 2017
Merging Cluster Collaboration: A Panchromatic Atlas of Radio Relic Mergers text January 2018