On the evidence for a cyanogen gradient in 47 Tucanae

Details On the evidence for a cyanogen gradient in 47 Tucanae On the evidence for a cyanogen gradient in 47 Tucanae

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pasp..101..811l&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 101, Sept. 1989, p. 811-815.

Astronomy and Astrophysics

Astronomy

3

Abundance, Cyanogen, Globular Clusters, Electrophotometry, Star Distribution, Statistical Distributions, Stellar Spectra

Scientific paper

The evidence for a radial gradient in the distribution of CN strengths among 47 Tuc giants (Norris and Freeman, 1979) is examined. Apparent differences are found between the distribution of cyanogen strengths determined from stellar spectra and the distribution determined from photoelectric photometry for stars in the same (outer) region of the cluster. This, together with the expected random variations in the observed distributions for a small number of stars, suggests that the available evidence for a CN gradient in 47 Tuc is suggestive but not compelling.

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