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Multiphase Black Hole Feedback and a Bright [C ii] Halo in a LoBAL Quasar at z ∼ 6.6

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Title: Multiphase Black Hole Feedback and a Bright [C ii] Halo in a LoBAL Quasar at z ∼ 6.6
Authors: Manuela Bischetti, Hyunseop Choi, Fabrizio Fiore, Chiara Feruglio, Stefano Carniani, Valentina D’Odorico, Eduardo Bañados, Huanqing Chen, Roberto Decarli, Simona Gallerani, Julie Hlavacek-Larrondo, Samuel Lai, Karen M. Leighly, Chiara Mazzucchelli, Laurence Perreault-Levasseur, Roberta Tripodi, Fabian Walter, Feige Wang, Jinyi Yang, Maria Vittoria Zanchettin, Yongda Zhu
Source: The Astrophysical Journal, Vol 970, Iss 1, p 9 (2024)
Publisher Information: IOP Publishing, 2024.
Publication Year: 2024
Collection: LCC:Astrophysics
Subject Terms: Broad-absorption line quasar, High-redshift galaxies, Galaxy evolution, Supermassive black holes, Spectroscopy, Interferometry, Astrophysics, QB460-466
More Details: Although the mass growth of supermassive black holes during the epoch of reionization is expected to play a role in shaping the concurrent growth of their host galaxies, observational evidence of feedback at z ≳ 6 is still sparse. We perform the first multiscale and multiphase characterization of black-hole-driven outflows in the z ∼ 6.6 quasar J0923+0402 and assess how these winds impact the cold gas reservoir. We employ the SimBAL spectral synthesis to fit broad absorption line features and find a powerful ionized outflow on a ≲210 pc scale, with a kinetic power ∼2%–100% of the quasar luminosity. Atacama Large Millimeter/submillimeter Array (ALMA) observations of [C ii ] emission allow us to study the morphology and kinematics of the cold gas. We detect high-velocity [C ii ] emission, likely associated with a cold neutral outflow at ∼0.5−2 kpc scale in the host galaxy, and a bright extended [C ii ] halo with a size of ∼15 kpc. For the first time at such an early epoch, we accurately constrain the outflow energetics in both the ionized and the atomic neutral gas phases. We find such energetics to be consistent with expectations for an efficient feedback mechanism, and both ejective and preventative feedback modes are likely at play. The scales and energetics of the ionized and atomic outflows suggest that they might be associated with different quasar accretion episodes. The results of this work indicate that strong black hole feedback is occurring in quasars at z ≳ 6 and is likely responsible for shaping the properties of the cold gas reservoir up to circumgalactic scales.
Document Type: article
File Description: electronic resource
Language: English
ISSN: 1538-4357
Relation: https://doaj.org/toc/1538-4357
DOI: 10.3847/1538-4357/ad4a77
Access URL: https://doaj.org/article/ba09e8dbe250469a871eb6016ab3502f
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  Data: Multiphase Black Hole Feedback and a Bright [C ii] Halo in a LoBAL Quasar at z ∼ 6.6
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  Data: <searchLink fieldCode="AR" term="%22Manuela+Bischetti%22">Manuela Bischetti</searchLink><br /><searchLink fieldCode="AR" term="%22Hyunseop+Choi%22">Hyunseop Choi</searchLink><br /><searchLink fieldCode="AR" term="%22Fabrizio+Fiore%22">Fabrizio Fiore</searchLink><br /><searchLink fieldCode="AR" term="%22Chiara+Feruglio%22">Chiara Feruglio</searchLink><br /><searchLink fieldCode="AR" term="%22Stefano+Carniani%22">Stefano Carniani</searchLink><br /><searchLink fieldCode="AR" term="%22Valentina+D%27Odorico%22">Valentina D’Odorico</searchLink><br /><searchLink fieldCode="AR" term="%22Eduardo+Bañados%22">Eduardo Bañados</searchLink><br /><searchLink fieldCode="AR" term="%22Huanqing+Chen%22">Huanqing Chen</searchLink><br /><searchLink fieldCode="AR" term="%22Roberto+Decarli%22">Roberto Decarli</searchLink><br /><searchLink fieldCode="AR" term="%22Simona+Gallerani%22">Simona Gallerani</searchLink><br /><searchLink fieldCode="AR" term="%22Julie+Hlavacek-Larrondo%22">Julie Hlavacek-Larrondo</searchLink><br /><searchLink fieldCode="AR" term="%22Samuel+Lai%22">Samuel Lai</searchLink><br /><searchLink fieldCode="AR" term="%22Karen+M%2E+Leighly%22">Karen M. Leighly</searchLink><br /><searchLink fieldCode="AR" term="%22Chiara+Mazzucchelli%22">Chiara Mazzucchelli</searchLink><br /><searchLink fieldCode="AR" term="%22Laurence+Perreault-Levasseur%22">Laurence Perreault-Levasseur</searchLink><br /><searchLink fieldCode="AR" term="%22Roberta+Tripodi%22">Roberta Tripodi</searchLink><br /><searchLink fieldCode="AR" term="%22Fabian+Walter%22">Fabian Walter</searchLink><br /><searchLink fieldCode="AR" term="%22Feige+Wang%22">Feige Wang</searchLink><br /><searchLink fieldCode="AR" term="%22Jinyi+Yang%22">Jinyi Yang</searchLink><br /><searchLink fieldCode="AR" term="%22Maria+Vittoria+Zanchettin%22">Maria Vittoria Zanchettin</searchLink><br /><searchLink fieldCode="AR" term="%22Yongda+Zhu%22">Yongda Zhu</searchLink>
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  Data: The Astrophysical Journal, Vol 970, Iss 1, p 9 (2024)
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  Data: Although the mass growth of supermassive black holes during the epoch of reionization is expected to play a role in shaping the concurrent growth of their host galaxies, observational evidence of feedback at z ≳ 6 is still sparse. We perform the first multiscale and multiphase characterization of black-hole-driven outflows in the z ∼ 6.6 quasar J0923+0402 and assess how these winds impact the cold gas reservoir. We employ the SimBAL spectral synthesis to fit broad absorption line features and find a powerful ionized outflow on a ≲210 pc scale, with a kinetic power ∼2%–100% of the quasar luminosity. Atacama Large Millimeter/submillimeter Array (ALMA) observations of [C ii ] emission allow us to study the morphology and kinematics of the cold gas. We detect high-velocity [C ii ] emission, likely associated with a cold neutral outflow at ∼0.5−2 kpc scale in the host galaxy, and a bright extended [C ii ] halo with a size of ∼15 kpc. For the first time at such an early epoch, we accurately constrain the outflow energetics in both the ionized and the atomic neutral gas phases. We find such energetics to be consistent with expectations for an efficient feedback mechanism, and both ejective and preventative feedback modes are likely at play. The scales and energetics of the ionized and atomic outflows suggest that they might be associated with different quasar accretion episodes. The results of this work indicate that strong black hole feedback is occurring in quasars at z ≳ 6 and is likely responsible for shaping the properties of the cold gas reservoir up to circumgalactic scales.
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