Metallicities of Young Open Clusters. I. NGC 7160 and NGC 2232
Abstract
We present a moderate-resolution spectroscopic analysis of the 10-25 Myr clusters NGC 7160 and NGC 2232 using observations obtained with the WIYN 3.5 m telescope. Both NGC 7160 and NGC 2232 are found to have super-solar metallicities, with a mean [Fe/H] = 0.16 ± 0.03 (s.e.m.) for NGC 7160, and 0.22 ± 0.09 (s.e.m.) or 0.32 ± 0.08 for NGC 2232, depending on the adopted temperature scale. NGC 7160 exhibits solar distributions of Na, Fe-peak, and α-elements. NGC 2232 is underabundant in light elements Al and Si, by ~0.25 and ~0.15 dex, respectively; [Ni/Fe] is roughly solar. The abundance of lithium in NGC 2232 stars is in agreement with undepleted values reported for other cluster main-sequence stars. Our abundances are similar to other metal-rich open clusters and Galactic thin and thick disk stars.
- Publication:
-
The Astronomical Journal
- Pub Date:
- December 2010
- DOI:
- 10.1088/0004-6256/140/6/2109
- arXiv:
- arXiv:1010.0739
- Bibcode:
- 2010AJ....140.2109M
- Keywords:
-
- circumstellar matter;
- open clusters and associations: general;
- open clusters and associations: individual: NGC 7160 NGC 2232;
- stars: abundances;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- Accepted for publication in The Astronomical Journal. 10 figures, 11 tables. Full versions of the data tables can be made available upon email request