The young SMC cluster NGC 330

Details The young SMC cluster NGC 330 The young SMC cluster NGC 330

Jul 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90.1196c&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 90, July 1985, p. 1196-1210.

Astronomy and Astrophysics

Astronomy

60

Magellanic Clouds, Star Clusters, Astronomical Spectroscopy, Color-Magnitude Diagram, Electrophotometry, Interstellar Extinction, Metallicity, Supergiant Stars, Ubv Spectra

Scientific paper

A color-magnitude diagram has been obtained for the young SMC cluster NGC 330. The diagram shows a well-defined main sequence, a group of blue supergiants, a group of red supergiants between B-V = 1.2 m and 1.6 m about one magnitude fainter, and an empty Hertzsprung gap. The surrounding field is a composite of a very gold population resembling galactic globular clusters and a very young population. DDO and infrared photometry strongly suggest that the cluster is metal-poor, but a definitive measure could not be made because of calibration difficulties. The cluster's age is estimated at 12 million years, with the surrounding field about 50 percent older. The cluster will prove very useful in testing stellar evolution models for young, metal-poor stars if the cluster's metallicity can be established via high-resolution spectroscopy.

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