Strong CN stars in the globular cluster NGC 1851

Spectroscopic observations made of 23 stars near the southern globular cluster NGC 1851 are presented, yielding spectra with resolutions of approximately 4 A. In performing a spectral analysis, several statements regarding the properties of giant stars in NGC 1851 are determined. First, it is indicated by the radial velocity data that several possible asymptotic-giant-branch or supra-horizontal-branch NGC 1851 stars are nonmembers. In addition, the star S368 appears to be a cluster member. Finally, observations suggest a similarity between the strong CN stars in NGC 1851 and an unusual giant ROA 253, in the globular cluster Omega Cen.