| DOI | Trouver le DOI : https://doi.org/10.1093/mnras/sty539 |
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| Auteur | Rechercher : Sollima, A.; Rechercher : Martínez Delgado, D..; Rechercher : Muñoz, R. R.; Rechercher : Carballo-Bello, J. A.; Rechercher : Valls-Gabaud, D.; Rechercher : Grebel, E. K.; Rechercher : Santana, F. A.; Rechercher : Côté, P.1; Rechercher : Djorgovski, S. G. |
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| Affiliation | - Conseil national de recherches du Canada. Herzberg en astronomie et en astrophysique
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| Format | Texte, Article |
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| Sujet | methods: observational; techniques: photometric; stars: Population II; globular clusters: general; Galaxy: halo; Galaxy: structure |
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| Résumé | We report the results of a systematic photometric survey of the peripheral regions of a sample of 14 globular clusters in the outer halo of the Milky Way at distances dGC > 25 kpc from the Galactic Centre. The survey is aimed at searching for the remnants of the host satellite galaxies where these clusters could originally have been formed before being accreted on to the Galactic halo. The limiting surface brightness varies within our sample, but reaches μV, lim = 30–32 mag arcsec−2. For only two globular clusters (NGC 7492 and Whiting 1; already suggested to be associated with the Sagittarius galaxy), we detect extended stellar populations that cannot be associated with either the clusters themselves or with the surrounding Galactic field population. We show that the lack of substructures around globular clusters at these Galactocentric distances is still compatible with the predictions of cosmological simulations whereby in the outer halo the Galactic globular cluster system is built up through hierarchical accretion at early epochs. |
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| Date de publication | 2018-03-03 |
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| Maison d’édition | Oxford University Press |
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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 NPARC | 23003512 |
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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 | 4e620a42-0efd-4d8c-9e36-de44cc2e2c0f |
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| Enregistrement créé | 2018-07-12 |
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| Enregistrement modifié | 2020-03-16 |
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