The cyanogen distributions in NGC 3201, M55, and M71

Details The cyanogen distributions in NGC 3201, M55, and M71 The cyanogen distributions in NGC 3201, M55, and M71

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...254..149s&link_type=abstract

Astrophysical Journal, Part 1, vol. 254, Mar. 1, 1982, p. 149-161.

Astronomy and Astrophysics

Astrophysics

81

Abundance, Cyanogen, Globular Clusters, Horizontal Branch Stars, Mass Distribution, Aluminum, Nitrogen, Sodium, Stellar Mass, Stellar Spectra

Scientific paper

It is found in a study of globular cluster cyanogen distributions for the cases of NGC 3201, M55 and M71, that M71 is similar to 47 Tuc not only in its CN distribution, but in the possession of a positive Na/CN correlation and a CO/CN anticorrelation. It is also determined that M55 is the first cluster having an Fe/H concentration ratio lower than about -1.9 which shows no cyanogen variations, and that NGC 3201, despite exhibiting a bimodal cyanogen distribution among its giants, possesses no corresponding bimodal distribution of stars along the horizontal branch.

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