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The Composition of Warm Giants in M 71 and M 5

Published online by Cambridge University Press:  19 July 2016

Catherine A. Pilachowski  and
Christopher Sneden
Catherine A. Pilachowski
Affiliation:
National Optical Astronomy Observatories∗ Kitt Peak National Observatory
Christopher Sneden
Affiliation:
McDonald Observatory, University of Texas

Extract

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In 1979 a disturbing controversy arose in the field of globular cluster research when Cohen (1980) and Pilachowski, Canterna, and Wallerstein (1980) announced the results of the first high dispersion studies of the composition of giants in the globular clusters M 71 and 47 Tucanae. In contrast to earlier studies, which found metallicities of typically −0.3 and −0.5 dex, these investigators obtained values of −1.3 and −1.1. Since then, many have attempted to redetermine the abundances of M 71 and 47 Tuc to explain the discrepant results. These efforts have all suffered from the absence of high signal-to-noise, high resolution spectra of stars with temperatures above 4300 K.

Type
Chapter VII. Poster Papers on Harlow Shapley and Globular Clusters in the Milky Way
Information
Symposium - International Astronomical Union , Volume 126: The Harlow-Shapley Symposium on Globular Cluster Systems in Galaxies , 1988 , pp. 497 - 498
Copyright
Copyright © Kluwer 1988 

References

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