M31 Globular Clusters in the HST Archive: I. Cluster Detection and Completeness

Abstract

Globular clusters at the distance of M31 have apparent angular sizes of a few arcseconds. While many M31 GCs have been detected and studied from ground-based images, the high spatial resolution of HST allows much more robust detection and characterization of star cluster properties. We present the results of a search of 157 HST/WFPC2 images of M31: we found 82 previously-cataloged globular cluster candidates as well as 32 new globular cluster candidates and 20 open cluster candidates. We present images of the new candidates and photometry for all clusters. We assess existing cluster catalogs' completeness and use the results to estimate the total number of GCs in M31 as 460+/-70. The specific frequency is S_N = 1.2+/-0.2 and the mass specific frequency T = 2.4+/-0.4; these values are at the upper end of the range seen for spiral galaxies.

Accepted to AJ. 33 pages with 6 figures, plus 4 separate figures

References in corpus (8)

• M31 Globular Clusters: Colors and Metallicities
• Distance to M31 With the HST and Hipparcos Red Clump Stars
• The Charge Transfer Efficiency and Calibration of WFPC2
• The Distance to the M31 Globular Cluster System
• The M31 Globular Cluster Luminosity Function
• Serendipitous 2MASS Discoveries Near the Galactic Plane: A Spiral Galaxy and Two Globular Clusters
• HST Imaging of Globular Clusters in the Edge--on Spiral Galaxies NGC 4565 and NGC 5907
• Testing population synthesis models with globular cluster colors

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