WFPC2 Observations of Massive and Compact Young Star Clusters in M31
Abstract
We present color magnitude diagrams of four blue massive and compact star clusters in M31: G38, G44, G94, and G293. The diagrams of the four clusters reveal a well-populated upper main sequence and various numbers of supergiants. The U-B and B-V colors of the upper main sequence stars are used to determine reddening estimates of the different lines of sight in the M31 disk. Reddening values range from E(B-V) = 0.20 +/- 0.10 to 0.31 +/- 0.11. We statistically remove field stars on the basis of completeness, magnitude and color. Isochrone fits to the field-subtracted, reddening-corrected diagrams yield age estimates ranging from 63 +/- 15 Myr to 160 +/- 60 Myr. Implications for the recent evolution of the disk near NGC 206 are discussed.
Cite
@article{arxiv.astro-ph/0010168,
title = {WFPC2 Observations of Massive and Compact Young Star Clusters in M31},
author = {Benjamin F. Williams and Paul W. Hodge},
journal= {arXiv preprint arXiv:astro-ph/0010168},
year = {2009}
}
Comments
17 pages, Latex, ApJ, in Press