Merging Gas-rich Galaxies That Harbor Low-luminosity Twin Quasars at z = 6.05: A Promising Progenitor of the Most Luminous Quasars<br />

We present Atacama Large Millimeter/submillimeter Array [C ii] 158 μm line and underlying far-IR continuum emission observations (0farcs57 × 0farcs46 resolution) toward a quasar–quasar pair system recently discovered at z = 6.05. The quasar nuclei (C1 and C2) are faint (M1450 ≳ −23 mag), but we dete...

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Authors: Izumi ,T., Matsuoka, Y., Onoue, M., Strauss, M. A., Umehata, H., Silverman, John D., Nagao, T., Imanishi, M., Kohno, K., Toba, Y., Iwasawa, Kazushi, Nakanish,i K., Sawamura, M., Fujimoto, S., Kikuta, S., Kawaguchi, T., Aoki, K., Goto, T.
Format: article
Status:Published version
Publication Date:2024
Country:España
Institution:Universidad de Barcelona
Repository:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/218249
Online Access:https://hdl.handle.net/2445/218249
Access Level:Open access
Keyword:Galàxies
Quàsars
Galaxies
Quasars
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spelling Merging Gas-rich Galaxies That Harbor Low-luminosity Twin Quasars at z = 6.05: A Promising Progenitor of the Most Luminous Quasars<br />Izumi ,T.Matsuoka, Y.Onoue, M.Strauss, M. A.Umehata, H.Silverman, John D.Nagao, T.Imanishi, M.Kohno, K.Toba, Y.Iwasawa, KazushiNakanish,i K.Sawamura, M.Fujimoto, S.Kikuta, S.Kawaguchi, T.Aoki, K.Goto, T.GalàxiesQuàsarsGalaxiesQuasarsWe present Atacama Large Millimeter/submillimeter Array [C ii] 158 μm line and underlying far-IR continuum emission observations (0farcs57 × 0farcs46 resolution) toward a quasar–quasar pair system recently discovered at z = 6.05. The quasar nuclei (C1 and C2) are faint (M1450 ≳ −23 mag), but we detect very bright [C ii] emission bridging the 12 kpc between the two objects and extending beyond them (total luminosity L[C ii] ≃ 6 × 109L⊙). The [C ii]-based total star formation rate of the system is ∼550 M⊙ yr−1 (the IR-based dust-obscured star formation is ∼100 M⊙ yr−1), with a [C ii]-based total gas mass of ∼1011M⊙. The dynamical masses of the two galaxies are large (∼9 × 1010M⊙ for C1 and ∼5 × 1010M⊙ for C2). There is a smooth velocity gradient in [C ii], indicating that these quasars are a tidally interacting system. We identified a dynamically distinct, fast-[C ii] component around C1: detailed inspection of the line spectrum there reveals the presence of a broad-wing component, which we interpret as the indication of fast outflows with a velocity of ∼600 km s−1. The expected mass-loading factor of the outflows, after accounting for multiphase gas, is ≳2 − 3, which is intermediate between AGN-driven and starburst-driven outflows. Hydrodynamic simulations in the literature predict that this pair will evolve to a luminous (M1450 ≲ −26 mag), starbursting (≳1000 M⊙ yr−1) quasar after coalescence, one of the most extreme populations in the early Universe.Institute of Physics (IOP)2024info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/218249Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésInglésReproducció del document publicat a: https://doi.org/10.3847/1538-4357/ad57c6Astrophysical Journal, 2024, vol. 972, num.116https://doi.org/10.3847/1538-4357/ad57c6(c) American Astronomical Society, 2024info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/2182492026-05-27T06:46:51Z
dc.title.none.fl_str_mv Merging Gas-rich Galaxies That Harbor Low-luminosity Twin Quasars at z = 6.05: A Promising Progenitor of the Most Luminous Quasars<br />
title Merging Gas-rich Galaxies That Harbor Low-luminosity Twin Quasars at z = 6.05: A Promising Progenitor of the Most Luminous Quasars<br />
spellingShingle Merging Gas-rich Galaxies That Harbor Low-luminosity Twin Quasars at z = 6.05: A Promising Progenitor of the Most Luminous Quasars<br />
Izumi ,T.
Galàxies
Quàsars
Galaxies
Quasars
title_short Merging Gas-rich Galaxies That Harbor Low-luminosity Twin Quasars at z = 6.05: A Promising Progenitor of the Most Luminous Quasars<br />
title_full Merging Gas-rich Galaxies That Harbor Low-luminosity Twin Quasars at z = 6.05: A Promising Progenitor of the Most Luminous Quasars<br />
title_fullStr Merging Gas-rich Galaxies That Harbor Low-luminosity Twin Quasars at z = 6.05: A Promising Progenitor of the Most Luminous Quasars<br />
title_full_unstemmed Merging Gas-rich Galaxies That Harbor Low-luminosity Twin Quasars at z = 6.05: A Promising Progenitor of the Most Luminous Quasars<br />
title_sort Merging Gas-rich Galaxies That Harbor Low-luminosity Twin Quasars at z = 6.05: A Promising Progenitor of the Most Luminous Quasars<br />
dc.creator.none.fl_str_mv Izumi ,T.
Matsuoka, Y.
Onoue, M.
Strauss, M. A.
Umehata, H.
Silverman, John D.
Nagao, T.
Imanishi, M.
Kohno, K.
Toba, Y.
Iwasawa, Kazushi
Nakanish,i K.
Sawamura, M.
Fujimoto, S.
Kikuta, S.
Kawaguchi, T.
Aoki, K.
Goto, T.
author Izumi ,T.
author_facet Izumi ,T.
Matsuoka, Y.
Onoue, M.
Strauss, M. A.
Umehata, H.
Silverman, John D.
Nagao, T.
Imanishi, M.
Kohno, K.
Toba, Y.
Iwasawa, Kazushi
Nakanish,i K.
Sawamura, M.
Fujimoto, S.
Kikuta, S.
Kawaguchi, T.
Aoki, K.
Goto, T.
author_role author
author2 Matsuoka, Y.
Onoue, M.
Strauss, M. A.
Umehata, H.
Silverman, John D.
Nagao, T.
Imanishi, M.
Kohno, K.
Toba, Y.
Iwasawa, Kazushi
Nakanish,i K.
Sawamura, M.
Fujimoto, S.
Kikuta, S.
Kawaguchi, T.
Aoki, K.
Goto, T.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Galàxies
Quàsars
Galaxies
Quasars
topic Galàxies
Quàsars
Galaxies
Quasars
description We present Atacama Large Millimeter/submillimeter Array [C ii] 158 μm line and underlying far-IR continuum emission observations (0farcs57 × 0farcs46 resolution) toward a quasar–quasar pair system recently discovered at z = 6.05. The quasar nuclei (C1 and C2) are faint (M1450 ≳ −23 mag), but we detect very bright [C ii] emission bridging the 12 kpc between the two objects and extending beyond them (total luminosity L[C ii] ≃ 6 × 109L⊙). The [C ii]-based total star formation rate of the system is ∼550 M⊙ yr−1 (the IR-based dust-obscured star formation is ∼100 M⊙ yr−1), with a [C ii]-based total gas mass of ∼1011M⊙. The dynamical masses of the two galaxies are large (∼9 × 1010M⊙ for C1 and ∼5 × 1010M⊙ for C2). There is a smooth velocity gradient in [C ii], indicating that these quasars are a tidally interacting system. We identified a dynamically distinct, fast-[C ii] component around C1: detailed inspection of the line spectrum there reveals the presence of a broad-wing component, which we interpret as the indication of fast outflows with a velocity of ∼600 km s−1. The expected mass-loading factor of the outflows, after accounting for multiphase gas, is ≳2 − 3, which is intermediate between AGN-driven and starburst-driven outflows. Hydrodynamic simulations in the literature predict that this pair will evolve to a luminous (M1450 ≲ −26 mag), starbursting (≳1000 M⊙ yr−1) quasar after coalescence, one of the most extreme populations in the early Universe.
publishDate 2024
dc.date.none.fl_str_mv 2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/218249
url https://hdl.handle.net/2445/218249
dc.language.none.fl_str_mv Inglés
Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.3847/1538-4357/ad57c6
Astrophysical Journal, 2024, vol. 972, num.116
https://doi.org/10.3847/1538-4357/ad57c6
dc.rights.none.fl_str_mv (c) American Astronomical Society, 2024
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Astronomical Society, 2024
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Institute of Physics (IOP)
publisher.none.fl_str_mv Institute of Physics (IOP)
dc.source.none.fl_str_mv Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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