UGC 4211: A Confirmed Dual Active Galactic Nucleus in the Local Universe at 230 pc Nuclear Separation

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dc.contributor.authorKoss, Michael J.
dc.contributor.authorTreister, Ezequiel
dc.contributor.authorKakkad, Darshan
dc.contributor.authorCasey-Clyde, J. Andrew
dc.contributor.authorKawamuro, Taiki
dc.contributor.authorWilliams, Jonathan
dc.contributor.authorFoord, Adi
dc.contributor.authorTrakhtenbrot, Benny
dc.contributor.authorBauer, Franz E.
dc.contributor.authorPrivon, George C.
dc.contributor.authorRicci, Claudio
dc.contributor.authorMushotzky, Richard
dc.contributor.authorBarcos-Munoz, Loreto
dc.contributor.authorBlecha, Laura
dc.contributor.authorConnor, Thomas
dc.contributor.authorHarrison, Fiona
dc.contributor.authorLiu, Tingting
dc.contributor.authorMagno, Macon
dc.contributor.authorMingarelli, Chiara M. F.
dc.contributor.authorMuller-Sanchez, Francisco
dc.contributor.authorOh, Kyuseok
dc.contributor.authorShimizu, T. Taro
dc.contributor.authorSmith, Krista Lynne
dc.contributor.authorStern, Daniel
dc.contributor.authorTello, Miguel Parra
dc.contributor.authorUrry, C. Megan
dc.date.accessioned2025-01-20T20:18:37Z
dc.date.available2025-01-20T20:18:37Z
dc.date.issued2023
dc.description.abstractWe present multiwavelength high-spatial resolution (similar to 0 ? 1, 70 pc) observations of UGC 4211 at z = 0.03474, a late-stage major galaxy merger at the closest nuclear separation yet found in near-IR imaging (0 " 32, similar to 230 pc projected separation). Using Hubble Space Telescope/Space Telescope Imaging Spectrograph, Very Large Telescope/MUSE+AO, Keck/OSIRIS+AO spectroscopy, and the Atacama Large Millimeter/submillimeter Array (ALMA) observations, we show that the spatial distribution, optical and near-infrared emission lines, and millimeter continuum emission are all consistent with both nuclei being powered by accreting supermassive black holes (SMBHs). Our data, combined with common black hole mass prescriptions, suggest that both SMBHs have similar masses, log (M-BH M-?) similar to 8.1 (south) and log (M-BH M-?) similar to 8.3 (north), respectively. The projected separation of 230 pc (similar to 6x the black hole sphere of influence) represents the closest-separation dual active galactic nuclei (AGN) studied to date with multiwavelength resolved spectroscopy and shows the potential of nuclear (< 50 pc) continuum observations with ALMA to discover hidden growing SMBH pairs. While the exact occurrence rate of close-separation dual AGN is not yet known, it may be surprisingly high, given that UGC 4211 was found within a small, volume-limited sample of nearby hard X-ray detected AGN. Observations of dual SMBH binaries in the subkiloparsec regime at the final stages of dynamical friction provide important constraints for future gravitational wave observatories.
dc.fuente.origenWOS
dc.identifier.doi10.3847/2041-8213/aca8f0
dc.identifier.eissn2041-8213
dc.identifier.issn2041-8205
dc.identifier.urihttps://doi.org/10.3847/2041-8213/aca8f0
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/92473
dc.identifier.wosidWOS:000913667900001
dc.issue.numero1
dc.language.isoen
dc.revistaAstrophysical journal letters
dc.rightsacceso restringido
dc.titleUGC 4211: A Confirmed Dual Active Galactic Nucleus in the Local Universe at 230 pc Nuclear Separation
dc.typeartículo
dc.volumen942
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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