Stroemgren photometry of late-type supergiants in the Small Magellanic Cloud

Details Stroemgren photometry of late-type supergiants in the Small Magellanic Cloud Stroemgren photometry of late-type supergiants in the Small Magellanic Cloud

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...211..199r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 211, no. 1, Feb. 1989, p. 199-207.

Astronomy and Astrophysics

Astrophysics

15

Astronomical Photometry, Late Stars, Magellanic Clouds, Supergiant Stars, Abundance, Chemical Evolution, Globular Clusters, Metallicity, Red Giant Stars, Stellar Color

Scientific paper

The results of Stroemgren photometry measurements on 64 red supergiants in the SMC were used to estimate the metallicity of these stars. To this purpose, a metallicity calibration was performed by measuring Stroemgren colors for red giants in galactic globular clusters, demonstrating that Stroemgren photometry could accurately rank globular clusters according to their metallicity. It was found that the average estimated metallicity of SMC supergiants is very low, compared to the galactic globular cluster giants. This can be qualitatively explained by a higher N/Fe ratio of the globular cluster stars. The scatter of Stroemgren colors among the SMC giants was surprisingly large.

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