| DOI | Trouver le DOI : https://doi.org/10.1088/0004-637X/769/2/145 |
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| Auteur | Rechercher : Wang, Q.; Rechercher : Peng, E.W.; Rechercher : Blakeslee, J.P.1; Rechercher : Côté, P.1; Rechercher : Ferrarese, L.1; Rechercher : Jordán, A.; Rechercher : Mei, S.; Rechercher : West, M.J. |
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| Affiliation | - Conseil national de recherches du Canada. Institut Herzberg d'astrophysique du CNRC
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| Format | Texte, Article |
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| Résumé | We study the azimuthal distribution of globular clusters (GCs) in early-type galaxies and compare them to their host galaxies using data from the ACS Virgo Cluster Survey. We find that in host galaxies with visible elongation (ε > 0.2) and intermediate to high luminosities (Mz < -19), the GCs are preferentially aligned along the major axis of the stellar light. The red (metal-rich) GC subpopulations show strong alignment with the major axis of the host galaxy, which supports the notion that these GCs are associated with metal-rich field stars. The metal-rich GCs in lenticular galaxies show signs of being more strongly associated with disks rather than bulges. Surprisingly, we also find that the blue (metal-poor) GCs can also show the same correlation. If the metal-poor GCs are part of the early formation of the halo and built up through mergers, then our results support a picture where halo formation and merging occur anisotropically, and that the present-day major axis is an indicator of the preferred merging axis. © 2013. The American Astronomical Society. All rights reserved.. |
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| Date de publication | 2013 |
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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 | 21269794 |
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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 | ef2f4315-1543-42af-9199-908f910ec0fe |
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| Enregistrement créé | 2013-12-13 |
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| Enregistrement modifié | 2020-04-22 |
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