Empirical colour-metallicity relations for Population II giant stars

Details Empirical colour-metallicity relations for Population II giant stars Empirical colour-metallicity relations for Population II giant stars

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...171...77m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 171, no. 1-2, Jan. 1987, p. 77-83.

Astronomy and Astrophysics

Astrophysics

5

Color-Magnitude Diagram, Globular Clusters, Metallicity, Milky Way Galaxy, Red Giant Stars, Abundance, Near Infrared Radiation, Stellar Models, Stellar Spectra, Visible Spectrum

Scientific paper

The published J, H, and K band photometry of Frogel et al. (1983) for a sample of over 350 red giants in 33 galactic globular clusters, which covers the complete range of metallicities found in globular clusters, is used to derive a set of empirical relations which allow to predict the intrinsic colors of Population II giants as a function of metallicity and absolute visual magnitude. These relations can be used directly in programs of population synthesis which combine populations which have different metallicities. Using the relations obtained, predictions are made for the numerical values of the latter, for a subset of clusters from the sample which shows significant deviation from the mean behavior of the clusters.

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