Identification and Analysis of Young Star Cluster Candidates in M31

Details Identification and Analysis of Young Star Cluster Candidates in M31 Identification and Analysis of Young Star Cluster Candidates in M31

2001-05-29

arxiv.org/abs/astro-ph/0105506v1

Astronomy and Astrophysics

Astrophysics

32 pages, 9 figures, 5 tables, accepted to ApJ

Scientific paper

10.1086/322424

We present a method for finding clusters of young stars in M31 using broadband WFPC2 data from the HST data archive. Applying our identification method to 13 WFPC2 fields, covering an area of ~60 arcmin^2, has revealed 79 new candidate young star clusters in these portions of the M31 disk. Most of these clusters are small (~<5 pc) young (~10-200 Myr) star groups located within large OB associations. We have estimated the reddening values and the ages of each candidate individually by fitting isochrones to the stellar photometry. We provide a catalog of the candidates including rough approximations of their reddenings and ages. We also look for patterns of cluster formation with galactocentric distance, but our rough estimates are not precise enough to reveal any clear patterns.

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