Tails and streams around the Galactic globular clusters NGC1851, NGC1904, NGC2298 and NGC2808
We present DECam imaging for the peculiar Galactic globular clusters NGC1851, NGC1904 (M79), NGC2298 and NGC2808. Our deep photometry reveals that all the clusters have an important contribution of stars beyond their King tidal radii and present tails with different morphologies. We have also explor...
Gespeichert in:
| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) Kapitel/Artikel |
| Sprache: | Englisch |
| Veröffentlicht: |
2017
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| In: |
Arxiv
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| Online-Zugang: | Verlag, kostenfrei, Volltext: http://arxiv.org/abs/1710.08927
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| Verfasserangaben: | Julio A. Carballo-Bello, David Martínez-Delgado, Camila Navarrete, Márcio Catelan, Ricardo R. Muñoz, Teresa Antoja, and Antonio Sollima |
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| 245 | 1 | 0 | |a Tails and streams around the Galactic globular clusters NGC1851, NGC1904, NGC2298 and NGC2808 |c Julio A. Carballo-Bello, David Martínez-Delgado, Camila Navarrete, Márcio Catelan, Ricardo R. Muñoz, Teresa Antoja, and Antonio Sollima |
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| 520 | |a We present DECam imaging for the peculiar Galactic globular clusters NGC1851, NGC1904 (M79), NGC2298 and NGC2808. Our deep photometry reveals that all the clusters have an important contribution of stars beyond their King tidal radii and present tails with different morphologies. We have also explored the surroundings of the clusters where the presence of the Canis Major overdensity and/or the low Galactic latitude Monoceros ring at d~8kpc is evident. A second stellar system is found at d~17kpc and spans at least 18deg x 15deg in the sky. As one of the possible scenarios to explain that feature, we propose that the unveiled system is part of Monoceros explained as a density wave moving towards the outer Milky Way. Alternatively, the unveiled system might be connected with other known halo substructures or associated with the progenitor dwarf galaxy of NGC1851 and NGC1904, which are widely considered accreted globular clusters. | ||
| 650 | 4 | |a Astrophysics - Astrophysics of Galaxies | |
| 650 | 4 | |a Astrophysics - Solar and Stellar Astrophysics | |
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