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| DOI | 10.1093/MNRAS/STU095 | ||||
| Año | 2014 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
We present new imaging and spectral data for globular clusters (GCs) around NGC 4365 and NGC 4342. NGC 4342 is a compact, X-ray luminous S0 galaxy with an unusually massive central black hole. NGC 4365 is another atypical galaxy that dominates the W' group of which NGC 4342 is a member. Using imaging from the MegaCam instrument on the Canada-France-Hawaii Telescope we identify a stream of GCs between the two galaxies and extending beyond NGC 4342. The stream of GCs is spatially coincident with a stream/plume of stars previously identified. We find that the photometric colours of the stream GCs match those associated with NGC 4342, and that the recession velocity of the combined GCs from the stream and NGC 4342 matches the recession velocity for NGC 4342 itself. These results suggest that NGC 4342 is being stripped of GCs (and stars) as it undergoes a tidal interaction with the nearby elliptical galaxy NGC 4365. We compare NGC 4342 to two well-known, tidally stripped galaxies (M32 and NGC 4486B) and find various similarities. We also discuss previous claims by Bogdan et al. that NGC 4342 cannot be undergoing significant tidal stripping because it hosts a large dark matter halo.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Blom, Christina | Mujer |
Swinburne Univ - Australia
Swinburne University of Technology - Australia |
| 2 | Forbes, Duncan A. | Hombre |
Swinburne Univ - Australia
Swinburne University of Technology - Australia |
| 3 | Foster, Caroline | Mujer |
Australian Astron Observ - Australia
ESO - Chile Australian Astronomical Observatory - Australia European Southern Observatory Santiago - Chile Observatorio Europeo Austral - Chile |
| 4 | ROMANOWSKY, AARON JOSHUA | Hombre |
San Jose State Univ - Estados Unidos
Univ Calif Observ - Estados Unidos San José State University - Estados Unidos University of California, Santa Cruz - Estados Unidos University of California Observatories - Estados Unidos |
| 5 | Brodie, Jean | Hombre |
Univ Calif Observ - Estados Unidos
University of California, Santa Cruz - Estados Unidos University of California Observatories - Estados Unidos |
| Fuente |
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| National Science Foundation |
| Australian Research Council |
| NSF |
| W. M. Keck Foundation |
| ARC |
| MarieCurie Actions of the European Commission (FP7-COFUND) |
| Directorate for Mathematical and Physical Sciences |
| Direct For Mathematical & Physical Scien |
| Agradecimiento |
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| We thank the reviewer for helpful comments on the manuscript and thank P. Nulsen and B. Matthews for stimulating discussions. We also thank M. Smith, V. Pota, C. Usher, S. Kartha and N. Pastorello for support during the preparation of this manuscript. The data presented herein were obtained at the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The analysis pipeline used to reduce the DEIMOS data was developed at UC Berkeley with support from NSF grant AST-0071048. This research used the facilities of the Canadian Astronomy Data Centre operated by the National Research Council of Canada with the support of the Canadian Space Agency. CF acknowledges co-funding under the MarieCurie Actions of the European Commission (FP7-COFUND). This work was supported in part by NSF grants AST-0909237 and AST-1211995 as well as ARC Discovery grant DP130100388. DAF was supported by ARC grant DP130100388. |