CN abundances in galactic globular clusters

Details CN abundances in galactic globular clusters CN abundances in galactic globular clusters

Mar 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mmsai..50..125c&link_type=abstract

(Workshop on Chemical Inhomogeneities in the Galaxy, Frascati, Italy, May 29-June 2, 1978.) Società Astronomica Italiana, Memori

Astronomy and Astrophysics

Astronomy

Abundance, Cyanogen, Galactic Clusters, Globular Clusters, Astronomical Observatories, Astronomical Spectroscopy, Hydrogen, Iron, Metallic Stars, Stellar Spectrophotometry, Ultraviolet Spectra

Scientific paper

The DDO colors of evolved stars in galactic globular clusters are analyzed and the cyanogen anomalies delta CN are derived. The observed relation between delta CN and (Fe/H) is in reasonable agreement with the existing theoretical calibration of delta CN in terms of heavy-element abundance. For the clusters which deviate from the general ranking, independent spectroscopic or photometric observations suggest peculiar CNO abundances. Finally, the large variation in CN strengths observed within metal-rich globular clusters seems correlated with a bimodal distribution of CN abundances.

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