BVI photometry of star clusters in M33

Abstract

view Abstract Citations (77) References (47) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS BVI Photometry of Star Clusters in M33 Christian, C. A. ; Schommer, R. A. Abstract CCD images of candidate star clusters in M33 were obtained for 13 fields in the B, V, and I bandpasses. The integrated visual colors and magnitudes are used to study the clusters, and evidence for extended giant branches and possibly carbon stars in several of the intermediate-aged clusters is presented. The colors, magnitudes, and positions are used to analyze stellar population of M33 and confirm the existence of massive star clusters with a 0.1 -10 Gyr age range. That is, the cluster system of M33 shares some similarities to that of the Magellanic Clouds in that relatively "massive" clusters are found at all ages. In addition, more than 20 true (i.e., old, massive) globulars are identified. A substantial population of intermediate-color clusters are found, and we argue that the cluster-formation rate for clusters <10 Gyr may be more continuous in M33 than in the Magellanic Clouds. The chemical evolution of M33 as traced by the clusters suggests that an abundance gradient existed at all ages in that the "outer" regions of the disk, i.e., R > 10 arcmin or 2 kpc, follow a slow enhancement history similar to the SMC, while the inner regions were enriched more dramatically. Publication: The Astronomical Journal Pub Date: March 1988 DOI: 10.1086/114668 Bibcode: 1988AJ.....95..704C Keywords: Carbon Stars; Magellanic Clouds; Star Clusters; Stellar Color; Stellar Mass; Stellar Spectrophotometry; Computational Astrophysics; Galactic Evolution; Globular Clusters; Spiral Galaxies; Astrophysics; CLUSTERS: OPEN; CLUSTERS: GLOBULAR; GALAXIES: GENERAL full text sources ADS | data products SIMBAD (107) NED (1)