• Please log in or register to access this feature.

Elemental abundances of intermediate-age open cluster NGC 3680†

  1. A. W. Mitschang1,2,*,
  2. G. M. De Silva3,
  3. D. B. Zucker1,2,3

Article first published online: 17 APR 2012

DOI: 10.1111/j.1365-2966.2012.20866.x

Issue

Monthly Notices of the Royal Astronomical Society

Monthly Notices of the Royal Astronomical Society

Volume 422, Issue 4, pages 3527–3534, June 2012

Additional Information

How to Cite

Mitschang, A. W., De Silva, G. M. and Zucker, D. B. (2012), Elemental abundances of intermediate-age open cluster NGC 3680. Monthly Notices of the Royal Astronomical Society, 422: 3527–3534. doi: 10.1111/j.1365-2966.2012.20866.x

Author Information

  1. 1

    Macquarie University Research Centre in Astronomy, Astrophysics & Astrophotonics NSW 2109, Australia

  2. 2

    Department of Physics & Astronomy, Macquarie University, NSW 2109, Australia

  3. 3

    Australian Astronomical Observatory, PO Box 296, Epping, NSW 1710, Australia

* Based on observations obtained at the European Southern Observatory, Paranal, Chile [ESO programme 072.B-0331(B)].
E-mail: arik.mitschang@mq.edu.au

Publication History

  1. Issue published online: 21 MAY 2012
  2. Article first published online: 17 APR 2012
  3. Accepted 2012 March 1. Received 2012 February 7; in original form 2011 December 18

SEARCH

SEARCH BY CITATION

ARTICLE TOOLS

View Full Article with Supporting Information (HTML) Get PDF (347K)

Keywords:

  • stars: abundances;
  • open clusters and associations: general;
  • open clusters and associations: individual: NGC 3680

ABSTRACT

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.

View Full Article with Supporting Information (HTML) Get PDF (347K)