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...
| Authors: | ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; |
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| 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 |
| _version_ | 1878741584593289216 |
|---|---|
| author | Izumi ,T. |
| 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 |
| author_browse | Aoki, K. Fujimoto, S. Goto, T. Imanishi, M. Iwasawa, Kazushi Izumi ,T. Kawaguchi, T. Kikuta, S. Kohno, K. Matsuoka, Y. Nagao, T. Nakanish,i K. Onoue, M. Sawamura, M. Silverman, John D. Strauss, M. A. Toba, Y. Umehata, H. |
| 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 |
| collection | Dipòsit Digital de la UB |
| 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. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_e7d0dfd8d218762d8a76da253c23a244 |
| institution | Universidad de Barcelona |
| instname_str | Universidad de Barcelona |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:diposit.ub.edu:2445/218249 |
| publishDate | 2024 |
| publishDateSort | 2024 |
| publisher | Institute of Physics (IOP) |
| publisherStr | Institute of Physics (IOP) |
| reponame_str | Dipòsit Digital de la UB |
| 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, Kazushi Nakanish,i K. Sawamura, M. Fujimoto, S. Kikuta, S. Kawaguchi, T. Aoki, K. Goto, T. Galàxies Quàsars Galaxies Quasars 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. Institute of Physics (IOP) https://hdl.handle.net/2445/218249 |
| 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 |
| status_str | publishedVersion |
| title | 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_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_sort | Merging Gas-rich Galaxies That Harbor Low-luminosity Twin Quasars at z = 6.05: A Promising Progenitor of the Most Luminous Quasars<br /> |
| topic | Galàxies Quàsars Galaxies Quasars |
| topic_facet | Galàxies Quàsars Galaxies Quasars |
| url | https://hdl.handle.net/2445/218249 |