| DOI | Trouver le DOI : https://doi.org/10.1093/mnras/stt2139 |
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| Auteur | Rechercher : Bate, N. F.; Rechercher : Conn, A. R.; Rechercher : McMonigal, B.; Rechercher : Lewis, G. F.; Rechercher : Martin, N. F.; Rechercher : McConnachie, A. W.1; Rechercher : Veljanoski, J.; Rechercher : Mackey, A. D.; Rechercher : Ferguson, A. M. N.; Rechercher : Ibata, R. A.; Rechercher : Irwin, M. J.; Rechercher : Fardal, M.; Rechercher : Huxor, A. P.; Rechercher : Babul, A. |
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| Affiliation | - Conseil national de recherches du Canada. Infrastructure scientifique nationale
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| Format | Texte, Article |
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| Résumé | We undertake the first detailed analysis of the stellar population and spatial properties of a diffuse substructure in the outer halo ofM31. The South-West Cloud lies at a projected distance of ̃100 kpc from the centre of M31 and extends for at least ̃50 kpc in projection. We use Pan-Andromeda Archaeological Survey photometry of red giant branch stars to determine a distance to the South-West Cloud of 793+45 -45 kpc. The metallicity of the cloud is found to be [Fe/H] = -1.3 ± 0.1. This is consistent with the coincident globular clusters PAndAS-7 and PAndAS-8, which have metallicities determined using an independent technique of [Fe/H] = -1.35 ± 0.15. We measure a brightness for the Cloud of MV = -12.1 mag; this is ̃75 per cent of the luminosity implied by the luminosity-metallicity relation. Under the assumption that the South-West Cloud is the visible remnant of an accreted dwarf satellite, this suggests that the progenitor object was amongst M31's brightest dwarf galaxies prior to disruption. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. |
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| Date de publication | 2013-12-03 |
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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 | 21270876 |
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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 | 33553aa1-0da0-4892-ad87-acfa99923670 |
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| Enregistrement créé | 2014-02-17 |
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| Enregistrement modifié | 2020-04-22 |
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