Ages and metallicities of LMC and SMC red clusters through H-beta and G band photometry

Details Ages and metallicities of LMC and SMC red clusters through H-beta and G band photometry Ages and metallicities of LMC and SMC red clusters through H-beta and G band photometry

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...156..261b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 156, no. 1-2, Feb. 1986, p. 261-267.

Astronomy and Astrophysics

Astrophysics

55

Chronology, Color-Magnitude Diagram, Globular Clusters, Metallicity, Star Clusters, Astronomical Photometry, Calibrating, Color-Color Diagram, Histograms, Magellanic Clouds

Scientific paper

The authors present narrow band integrated photometry of the Hβ and G band absorption features for 41 LMC and 10 SMC red star clusters. An age-metallicity calibration is provided for the color-color diagram. SWB types are derived between IV and VII for 23 unclassified clusters and their distribution in the ages vs metallicity plane is discussed. The authors study the chemical evolution of the Magellanic Clouds: the LMC presents a steeper chemical enrichment slope. An intrinsic metallicity dispersion is found in the LMC chemical evolution, indicating that the gas has been inhomogeneous at any time, prevailing a local enrichment over a global one. One zone models describe the evolution of both Clouds, being the efficiency of star cluster formation larger in the LMC. The LMC presents a burst of star cluster formation at t = 4.5×109yr. The authors also present new B-V data for fainter SMC clusters, providing an essentially complete color histogram for clusters with globular cluster appearance.

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