SIMBAD references

2012MNRAS.422.3527M - Mon. Not. R. Astron. Soc., 422, 3527-3534 (2012/June-1)

Elemental abundances of intermediate-age open cluster NGC 3680.


Abstract (from CDS):

We present a new abundance analysis of the intermediate-age Galactic open cluster NGC 3680, based on high-resolution, high signal-to-noise ratio 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 anticorrelation 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 asymptotic giant branch nucleosynthesis models, suggesting that the r process played a significant role in the generation of both La and Nd in this cluster.

Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society2012 RAS

Journal keyword(s): stars: abundances - open clusters and associations: general - open clusters and associations: individual: NGC 3680

VizieR on-line data: <Available at CDS (J/MNRAS/422/3527): table1.dat table2.dat>

Status at CDS:  

Simbad objects: 18

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