CN and CH variations among red giants in the globular cluster NGC 6171

Details CN and CH variations among red giants in the globular cluster NGC 6171 CN and CH variations among red giants in the globular cluster NGC 6171

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....95..755s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 95, March 1988, p. 755-761.

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6

Cn Emission, Color-Magnitude Diagram, Globular Clusters, Methyl Compounds, Red Giant Stars, Vibrational Spectra, Chemical Composition, Computational Astrophysics, Lyra Constellation, Metallic Stars, Stellar Color, Stellar Spectra

Scientific paper

Observations of the λ4215 CN and λ4300 CH band strengths are presented for a sample of 36 giants in the globular cluster NGC 6171 (Cl 1629-129). A substantial range of CN strengths is observed among giants of similar magnitude and color. Giants in the magnitude range 13.8 < V < 15.0 display a bimodal distribution of CN strengths. There is a general anticorrelation between the CN and CH band strengths; however, a small number of stars are found to show enhancements of both the CN and CH bands.

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