| Téléchargement | - Voir la version finale : First light and reionisation epoch simulations (FLARES). IV. The size evolution of galaxies at z ≥ 5 (PDF, 3.3 Mio)
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| DOI | Trouver le DOI : https://doi.org/10.1093/mnras/stac1368 |
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| Auteur | Rechercher : Roper, William J.Identifiant ORCID : https://orcid.org/0000-0002-3257-8806; Rechercher : Lovell, Christopher C.Identifiant ORCID : https://orcid.org/0000-0001-7964-5933; Rechercher : Vijayan, Aswin P.Identifiant ORCID : https://orcid.org/0000-0002-1905-4194; Rechercher : Marshall, Madeline A.1; Rechercher : Irodotou, DimitriosIdentifiant ORCID : https://orcid.org/0000-0003-2946-8080; Rechercher : Kuusisto, Jussi K.; Rechercher : Thomas, Peter A.Identifiant ORCID : https://orcid.org/0000-0001-6888-6483; Rechercher : Wilkins, Stephen M.Identifiant ORCID : https://orcid.org/0000-0003-3903-6935 |
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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 : BEIS; Rechercher : STFC; Rechercher : Durham University |
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| Format | Texte, Article |
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| Sujet | galaxies: evolution; galaxies: high-redshift; galaxies: photometry |
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| Résumé | We present the intrinsic and observed sizes of galaxies at z ≥ 5 in the First Light And Reionisation Epoch Simulations (FLARES). We employ the large effective volume of FLARES to produce a sizeable sample of high-redshift galaxies with intrinsic and observed luminosities and half-light radii in a range of rest-frame ultraviolet (UV) and visual photometric bands. This sample contains a significant number of intrinsically ultracompact galaxies in the far-UV (1500 Å), leading to a negative intrinsic far-UV size–luminosity relation. However, after the inclusion of the effects of dust these same compact galaxies exhibit observed sizes that are as much as 50 times larger than those measured from the intrinsic emission, and broadly agree with a range of observational samples. This increase in size is driven by the concentration of dust in the core of galaxies, heavily attenuating the intrinsically brightest regions. At fixed luminosity we find a galaxy size redshift evolution with a slope of m = 1.21–1.87 depending on the luminosity sample in question, and we demonstrate the wavelength dependence of the size–luminosity relation that will soon be probed by the James Webb Space Telescope. |
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| Date de publication | 2022-05-19 |
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| Maison d’édition | Oxford Academic |
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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 | e9dcc5d6-3295-4b56-b925-dc5bf883656c |
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| Enregistrement créé | 2023-12-04 |
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| Enregistrement modifié | 2023-12-04 |
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