Intermediate-Age Clusters in a Field Containing M31 and M32 Stars
Abstract
Hubble Space Telescope/Advanced Camera for Surveys fields toward M31 and M32 were examined for the presence of possible star clusters. On the basis of stellar photometry, two intermediate-age clusters were found in the field that contains both M31 and M32 stars. One is approximately 200 Myr of age with a mass ~400 M sun, and the other is 1 Gyr old with mass ~8 × 104 M sun. Several other cluster candidates are identified, but their stellar populations are more similar to the field: old and slightly metal-poor.
- Publication:
-
The Astronomical Journal
- Pub Date:
- December 2009
- DOI:
- 10.1088/0004-6256/138/6/1985
- Bibcode:
- 2009AJ....138.1985R
- Keywords:
-
- galaxies: individual: NGC 221 NGC 224;
- galaxies: star clusters;
- galaxies: stellar content;
- Local Group;
- open clusters and associations: individual: newly discovered clusters