| DOI | Trouver le DOI : https://doi.org/10.1093/mnras/stab1864 |
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| Auteur | Rechercher : Mayes, Rebecca J.Identifiant ORCID : https://orcid.org/0000-0003-2311-7917; Rechercher : Drinkwater, Michael J.Identifiant ORCID : https://orcid.org/0000-0003-4867-0022; Rechercher : Pfeffer, JoelIdentifiant ORCID : https://orcid.org/0000-0003-3786-8818; Rechercher : Baumgardt, HolgerIdentifiant ORCID : https://orcid.org/0000-0002-1959-6946; Rechercher : Liu, Chengze; Rechercher : Ferrarese, Laura1; Rechercher : Côté, Patrick1; Rechercher : Peng, Eric W. |
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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 : Australian Research Council; Rechercher : National Natural Science Foundation of China; Rechercher : CEA; Rechercher : National Research Council; Rechercher : Institut National des Sciences de l'Univers, Centre National de la Recherche Scientifique; Rechercher : University of Hawaii; Rechercher : STFC; Rechercher : BEIS; Rechercher : Durham University |
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| Format | Texte, Article |
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| Sujet | methods: numerical; galaxies: dwarf; galaxies: formation; galaxies: interactions; galaxies: nuclei; galaxies: star clusters: general |
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| Résumé | We use the hydrodynamical EAGLE simulation to test if ultracompact dwarf galaxies (UCDs) can form by tidal stripping by predicting the ages and metallicities of tidally stripped galaxy nuclei in massive galaxy clusters, and compare these results to compiled observations of age and metallicities of observed UCDs. We further calculate the colours of our sample of simulated stripped nuclei using single stellar population models and compare these colours to observations of UCDs in the Virgo Cluster. We find that the ages of observed UCDs are consistent with simulated stripped nuclei, with both groups of objects having a mean age >9 Gyr. Both stripped nuclei and UCDs follow a similar mass–metallicity relationship, and the metallicities of observed UCDs are consistent with those of simulated stripped nuclei for objects with M > 10⁷ M⊙. The colours of observed UCDs are also consistent with our simulated stripped nuclei, for objects with M > 10⁷ M⊙, with more massive objects being redder. We find that the colours of stripped nuclei exhibit a bimodal red and blue distribution that can be explained by the dependency of colour on age and metallicity, and by the mass–colour relation. We additionally find that our low-mass stripped nuclei sample is consistent with the colour of blue globular clusters. We conclude that the internal properties of simulated nuclei support the tidal stripping model of UCD formation. |
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| Date de publication | 2021-07-02 |
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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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| Numéro du CNRC | [identifier] |
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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 | b23fd719-f2c8-4adf-8af7-1f8c3cac939e |
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| Enregistrement créé | 2023-05-02 |
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| Enregistrement modifié | 2023-05-02 |
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