Elemental abundances of intermediate-age open cluster NGC 3680★
| Autor: | Daniel B. Zucker, A. W. Mitschang, G. M. De Silva |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Physics
High resolution Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Space and Planetary Science Nucleosynthesis Abundance (ecology) Globular cluster Cluster (physics) Astrophysics::Solar and Stellar Astrophysics Atomic number Astrophysics::Galaxy Astrophysics Open cluster |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 422:3527-3534 |
| ISSN: | 0035-8711 |
| DOI: | 10.1111/j.1365-2966.2012.20866.x |
| Popis: | We present a new abundance analysis of the intermediate age Galactic open cluster NGC 3680, based on high resolution, high signal-to-noise VLT/UVES spectroscopic data. Several element abundances are presented for this cluster for the first time, but most notably we derive abundances for the light and heavy s-process elements Y, Ba, La, and Nd. The serendipitous measurement of the rare-earth r-process element Gd is also reported. This cluster exhibits a significant enhancement of Na in giants as compared to dwarfs, which may be a proxy for an O to Na anti-correlation as observed in Galactic globular clusters but not open clusters. We also observe a step-like enhancement of heavy s-process elements towards higher atomic number, contrary to expectations from AGB nucleosynthesis models, suggesting that the r-process played a significant role in the generation of both La and Nd in this cluster |
| Databáze: | OpenAIRE |
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