Metallicities of NGC 7160 and NGC 2232: 10-30 Myr Open Clusters with Debris Disks
Abstract
We present an analysis of moderate-resolution WIYN-Hydra spectra of F and G stars in two 10-30 Myr old open clusters, NGC 7160 and NGC 2232, observed at 24 microns with Spitzer Space Telescope. Metallicities were determined for each cluster member differentially with respect to the Sun to determine global cluster abundances on an uniform scale with reduced systematic effects. Our multi-object spectrograph observations from WIYN-Hydra (and also Magellan-MMFS) are part of a larger project to complement MIPS 24 micron observations of 18 northern and southern clusters in the age range of 3 to 200 Myr, which were examined for excess MIR emission. The aim of this program is to consider the role that stellar metallicity may play in debris disk frequency and longevity for B and A cluster stars.
Support for this work was provided by an award issued by JPL/Caltech and the NASA Graduate Student Researchers Program.- Publication:
-
American Astronomical Society Meeting Abstracts #215
- Pub Date:
- January 2010
- Bibcode:
- 2010AAS...21542825M