A Multiwavelength Portrait of the 3C 220.3 Lensed System

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dc.contributor.authorHyman, Sóley Ó
dc.contributor.authorWilkes, Belinda J.
dc.contributor.authorWillner, S. P.
dc.contributor.authorKuraszkiewicz, Joanna
dc.contributor.authorAzadi, Mojegan
dc.contributor.authorWorrall, D. M.
dc.contributor.authorFoord, Adi
dc.contributor.authorVegetti, Simona
dc.contributor.authorAshby, Matthew L. N.
dc.contributor.authorBirkinshaw, Mark
dc.contributor.authorFassnacht, Christopher
dc.contributor.authorHaas, Martin
dc.contributor.authorStern, Daniel
dc.date.accessioned2024-08-20T13:45:44Z
dc.date.available2024-08-20T13:45:44Z
dc.date.issued2024-07-30
dc.description.abstractThe 3C 220.3 system is a rare case of a foreground narrow-line radio galaxy (“galaxy A,” zₐ = 0.6850) lensing a background submillimeter galaxy (zₛₘG₁ = 2.221). New spectra from MMT/Binospec confirm that the companion galaxy (“galaxy B”) is part of the lensing system with zB = 0.6835. New threecolor HST data reveal a full Einstein ring and allow a more precise lens model. The new HST images also reveal extended emission around galaxy A, and the spectra show extended [O II] emission with irregular morphology and complex velocity structure. All indications are that the two lensing galaxies are a gravitationally interacting pair. Strong [O II] emission from both galaxies A and B suggests current star formation, which could be a consequence of the interaction. This would indicate a younger stellar population than previously assumed and imply smaller stellar masses for the same luminosity. The improved lens model and expanded spectral energy distributions have enabled better stellar-mass estimates for the foreground galaxies. The resulting dark matter fractions are ~0.8, higher than previously calculated. Deeper Chandra imaging shows extended X-ray emission but no evidence for a point X-ray source associated with either galaxy. The detection of X-rays from the radio lobes of 3C 220.3 allows an estimate of ~3 nT for the magnetic fields in the lobes, a factor of ~3 below the equipartition fields, as typical for radio galaxies.
dc.description.sponsorshipThe authors acknowledge with great sadness the death of our long-time collaborator and co-author Professor Mark Birkinshaw in 2023 July. Mark’s contributions to our collaboration and deep knowledge of radio galaxies have always been invaluable to us, and his enthusiasm will continue to be an inspiration. We miss him. The authors thank Christian Leipski for providing the reduced HST images and Ben Weiner and Sean Moran for their help with the Binospec scheduling and data reduction, respectively. This research is based on observations made with the NASA/ESA Hubble Space Telescope obtained from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-–26555. The HST observations of 3C220.3 are associated with program GO-13506 and the work was supported by grant HST-GO-13506.001-A. Support for this work was provided by the National Aeronautics and Space Administration through Chandra Award Number GO4-15102X issued by the Chandra X-ray Center, which is operated by the Smithsonian Astrophysical Observatory for and on behalf of the National Aeronautics Space Administration under contract NAS8-03060. BJW, JK and MA acknowledge the support of NASA contract: NAS8-03060. BJW acknowledges the support of the Royal Society and the Wolfson Foundation while at the University of Bristol, UK. SOH acknowledges support for her research from the ´ Peter Wehinger Graduate Student Fellowship Fund of the Steward Observatory of the University of Arizona. This research has made use of data obtained from the Chandra Data Archive and the Chandra Source Catalog, and software provided by the Chandra X-ray Center (CXC) in the application packages CIAO, ChIPS, and Sherpa. The scientific results reported in this article are based in part on observations made by the Chandra X-ray Observatory using OBSIDs 16081, 16082, 16520, 16521, and 16522. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. This work is based in part on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. This research has made use of the NASA/IPAC Infrared Science Archive, which is funded by the National Aeronautics and Space Administration and operated by the California Institute of Technology. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA. The Submillimeter Array is a joint project between the Smithsonian Astrophysical Observatory and the Academia Sinica Institute of Astronomy and Astrophysics and is funded by the Smithsonian Institution and the Academia Sinica. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. This research made use of Photutils, an Astropy package for detection and photometry of astronomical sources (Bradley et al. 2023) and Regions, an Astropy package for region handling (Bradley et al. 2022). The HST and Chandra data used in this paper can be accessed at 10.17909/ghjp-t523 and 10.25574/cdc.210, respectively.
dc.description.urihttp://arxiv.org/abs/2407.21020
dc.format.extent23 pages
dc.genrejournal articles
dc.genrepreprints
dc.identifierdoi:10.13016/m2nln1-hjm0
dc.identifier.urihttps://doi.org/10.48550/arXiv.2407.21020
dc.identifier.urihttp://hdl.handle.net/11603/35745
dc.language.isoen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Physics Department
dc.relation.ispartofUMBC Faculty Collection
dc.subjectAstrophysics - Astrophysics of Galaxies
dc.titleA Multiwavelength Portrait of the 3C 220.3 Lensed System
dc.typeText
dcterms.creatorhttps://orcid.org/0000-0002-1616-1701

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