Téléchargement | - Voir la version finale : Chaotic and clumpy galaxy formation in an extremely massive reionization-era halo (PDF, 1.3 Mio)
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DOI | Trouver le DOI : https://doi.org/10.3847/2041-8213/ac61e6 |
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Auteur | Rechercher : Spilker, Justin S.Identifiant ORCID : https://orcid.org/0000-0003-3256-5615; Rechercher : Hayward, Christopher C.Identifiant ORCID : https://orcid.org/0000-0003-4073-3236; Rechercher : Marrone, Daniel P.Identifiant ORCID : https://orcid.org/0000-0002-2367-1080; Rechercher : Aravena, ManuelIdentifiant ORCID : https://orcid.org/0000-0002-6290-3198; Rechercher : Béthermin, MatthieuIdentifiant ORCID : https://orcid.org/0000-0002-3915-2015; Rechercher : Burgoyne, JamesIdentifiant ORCID : https://orcid.org/0000-0001-8706-1268; Rechercher : Chapman, Scott C.1; Rechercher : Greve, Thomas R.Identifiant ORCID : https://orcid.org/0000-0002-2554-1837; Rechercher : Gururajan, Gayathri; Rechercher : Hezaveh, Yashar D.Identifiant ORCID : https://orcid.org/0000-0002-8669-5733; Rechercher : Hill, Ryley; Rechercher : Litke, Katrina C.Identifiant ORCID : https://orcid.org/0000-0002-4208-3532; Rechercher : Lovell, Christopher C.Identifiant ORCID : https://orcid.org/0000-0001-7964-5933; Rechercher : Malkan, Matthew A.Identifiant ORCID : https://orcid.org/0000-0001-6919-1237; Rechercher : Murphy, Eric J.Identifiant ORCID : https://orcid.org/0000-0001-7089-7325; Rechercher : Narayanan, DesikaIdentifiant ORCID : https://orcid.org/0000-0002-7064-4309; Rechercher : Phadke, Kedar A.Identifiant ORCID : https://orcid.org/0000-0001-7946-557X; Rechercher : Reuter, CassieIdentifiant ORCID : https://orcid.org/0000-0001-7477-1586; Rechercher : Stark, Antony A.Identifiant ORCID : https://orcid.org/0000-0002-2718-9996; Rechercher : Sulzenauer, NikolausIdentifiant ORCID : https://orcid.org/0000-0002-3187-1648; Rechercher : Vieira, Joaquin D.Identifiant ORCID : https://orcid.org/0000-0001-7192-3871; Rechercher : Vizgan, DavidIdentifiant ORCID : https://orcid.org/0000-0001-7610-5544; Rechercher : Weiß, AxelIdentifiant ORCID : https://orcid.org/0000-0003-4678-3939 |
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Affiliation | - Conseil national de recherches du Canada. Herzberg en astronomie et en astrophysique
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Bailleur de fonds | Rechercher : Space Telescope Science Institute; Rechercher : National Science Foundation |
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Format | Texte, Article |
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Sujet | high-redshift galaxies; starburst galaxies |
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Résumé | The SPT 0311–58 system at z = 6.900 is an extremely massive structure within the reionization epoch and offers a chance to understand the formation of galaxies at an extreme peak in the primordial density field. We present 70 mas Atacama Large Millimeter/submillimeter Array observations of the dust continuum and [C ii] 158 μm emission in the central pair of galaxies and reach physical resolutions of ∼100–350 pc, among the most detailed views of any reionization-era system to date. The observations resolve the source into at least a dozen kiloparsec-size clumps. The global kinematics and high turbulent velocity dispersion within the galaxies present a striking contrast to recent claims of dynamically cold thin-disk kinematics in some dusty galaxies just 800 Myr later at z ∼ 4. We speculate that both gravitational interactions and fragmentation from massive parent disks have likely played a role in the overall dynamics and formation of clumps in the system. Each clump individually is comparable in mass to other 6 < z < 8 galaxies identified in rest-UV/optical deep field surveys, but with star formation rates elevated by a factor of ~3-5. Internally, the clumps themselves bear close resemblance to greatly scaled-up versions of virialized cloud-scale structures identified in low-redshift galaxies. Our observations are qualitatively similar to the chaotic and clumpy assembly within massive halos seen in simulations of high-redshift galaxies. |
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Date de publication | 2022-04-08 |
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Maison d’édition | IOP |
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Licence | |
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Dans | |
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Langue | anglais |
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Publications évaluées par des pairs | Oui |
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Exporter la notice | Exporter en format RIS |
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Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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Identificateur de l’enregistrement | 221e73c7-6de3-414f-9a9a-945985e20ff0 |
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Enregistrement créé | 2023-10-06 |
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Enregistrement modifié | 2023-10-06 |
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