Analysis of integrated spectra of red star clusters in the Magellanic Clouds

Details Analysis of integrated spectra of red star clusters in the Magellanic Clouds Analysis of integrated spectra of red star clusters in the Magellanic Clouds

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...261...85r&link_type=abstract

Astrophysical Journal, Part 1, vol. 261, Oct. 1, 1982, p. 85-101. Research supported by the California Institute of Technology

Astronomy and Astrophysics

Astrophysics

83

Astronomical Spectroscopy, Globular Clusters, Magellanic Clouds, Red Giant Stars, Spectrum Analysis, Abundance, Balmer Series, H Lines, Spectral Line Width

Scientific paper

The present investigation has the objective to demonstrate that integrated spectra can play an important role in the quantitative analysis of the ages and abundances of star clusters. In particular, it is shown that by comparing the strength of the Balmer lines with the strength of a metallic feature, and guided by a sequence of model star clusters and the empirical sequence of Galactic globular clusters, one may infer age differences between fairly old clusters, for each of which a color-magnitude study to extremely faint magnitudes would be necessary to approach the main sequence. Most Magellanic Cloud clusters are younger than Galactic globulars and lack a developed horizontal branch.

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