Smith, Graeme Hayward
Spectroscopic and photometric observations have been made
of the cyanogen band strength distributions within the five globular
clusters NGC 362, NGC 3201, MS, M71 and MSS. Of these, the first
three, and probably M71, are found to exhibit bimodal CN
distributions. In NGC 3201, MS and M71, the CN-enhanced giants, on
average, have weaker CH and/or CO bands than the CN-poor giants.
This suggests the presence of a C,N abundance anticorrelation
between the CN-weak and CN-strong populations of...[Show more]
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