A comparative high-resolution spectroscopic analysis of in situ and accreted globular clusters
Globular clusters (GCs) are extremely intriguing systems that help in reconstructing the assembly of the Milky Way via the characterisation of their chemo-chrono-dynamical properties. In this study, we use high-resolution spectroscopic archival data from UVES and UVES-FLAMES at the VLT to compare th...
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| Main Authors: | , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
November 2024
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| In: |
Astronomy and astrophysics
Year: 2024, Volume: 691, Pages: 1-16 |
| ISSN: | 1432-0746 |
| DOI: | 10.1051/0004-6361/202451377 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1051/0004-6361/202451377 Verlag, kostenfrei, Volltext: https://www.aanda.org/articles/aa/abs/2024/11/aa51377-24/aa51377-24.html 
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| Author Notes: | E. Ceccarelli, A. Mucciarelli, D. Massari, M. Bellazzini, and T. Matsuno |
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| 100 | 1 | |a Ceccarelli, Edoardo |e VerfasserIn |0 (DE-588)1360839143 |0 (DE-627)1920337873 |4 aut | |
| 245 | 1 | 2 | |a A comparative high-resolution spectroscopic analysis of in situ and accreted globular clusters |c E. Ceccarelli, A. Mucciarelli, D. Massari, M. Bellazzini, and T. Matsuno |
| 264 | 1 | |c November 2024 | |
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| 500 | |a Online veröffentlicht: 15. November 2024 | ||
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| 520 | |a Globular clusters (GCs) are extremely intriguing systems that help in reconstructing the assembly of the Milky Way via the characterisation of their chemo-chrono-dynamical properties. In this study, we use high-resolution spectroscopic archival data from UVES and UVES-FLAMES at the VLT to compare the chemistry of GCs dynamically tagged as either Galactic (NGC 6218, NGC 6522, and NGC 6626) or accreted from distinct merger events (NGC 362 and NGC 1261 from Gaia-Sausage-Enceladus, and Ruprecht 106 from the Helmi Streams) in the metallicity regime where abundance patterns of field stars with different origin effectively separate (−1.3 ≤ [Fe/H] ≤ −1.0 dex). We find remarkable similarities in the abundances of the two Gaia-Sausage-Enceladus GCs across all chemical elements. They both display depletion in the α-elements (Mg, Si and Ca) and statistically significant differences in Zn and Eu compared to in situ GCs. Additionally, we confirm that Ruprecht 106 exhibits a completely different chemical makeup from the other target clusters, being underabundant in all chemical elements. This demonstrates that when high precision is achieved, the abundances of certain chemical elements can not only efficiently separate in situ from accreted GCs, but can also distinguish among GCs born in different progenitor galaxies. In the end, we investigate the possible origin of the chemical peculiarity of Ruprecht 106. Given that its abundances do not match the chemical patterns of the field stars associated with its most likely parent galaxy (i.e. the Helmi Streams), being depleted in the abundances of α-elements in particular, we believe Ruprecht 106 to originate from a less massive galaxy compared to the progenitor of the Helmi Streams. | ||
| 700 | 1 | |a Mucciarelli, A. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Massari, D. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Bellazzini, M. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Matsuno, Tadafumi |e VerfasserIn |0 (DE-588)1343346533 |0 (DE-627)1903587220 |4 aut | |
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