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Title:
Intermediate-Age Clusters in a Field Containing M31 and M32 Stars
Authors:
Rudenko, Pavlo; Worthey, Guy; Mateo, Mario
Affiliation:
AA(Department of Physics and Astronomy, Washington State University, Pullman, WA 99164-2814, USA ), AB(Department of Physics and Astronomy, Washington State University, Pullman, WA 99164-2814, USA ), AC(Department of Astronomy, University of Michigan, 830 Dennison Building, Ann Arbor, MI 48109-1042, USA )
Publication:
The Astronomical Journal, Volume 138, Issue 6, pp. 1985-1989 (2009). (AJ Homepage)
Publication Date:
12/2009
Origin:
IOP
AJ Keywords:
galaxies: individual: NGC 221 NGC 224, galaxies: star clusters, galaxies: stellar content, Local Group, open clusters and associations: individual: newly discovered clusters
DOI:
10.1088/0004-6256/138/6/1985
Bibliographic Code:
2009AJ....138.1985R

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.
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