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The Chemical-Composition of Distant Globular-Clusters - Are There Any Metal-Poor Clusters

Pilachowski, Ca and Bothun, Gd and Olszewski, Ew and Odell, Andrew (1983) The Chemical-Composition of Distant Globular-Clusters - Are There Any Metal-Poor Clusters. Astrophysical Journal, 273 (1). pp. 187-194. ISSN 1538-4357


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Publisher’s or external URL: http://dx.doi.org/10.1086/161357


The authors report echelle spectroscopy of giants in the distant globular clusters N4147, M53, N5466, and N6229. Abundances are determined from model atmosphere analyses of the equivalent widths of the metal lines. The analyses yield [Fe/H] values in the range of -1.3 to -1.9. These values are moderately high for clusters at these galactocentric distances (R ≡ 20 kpc). The data argue against the existence of a strong metallicity gradient in the halo. They may also suggest that the cluster system of the Galaxy predates the formation of the bulge and halo system.

Item Type: Article
Publisher’s Statement: © 1983 The American Astronomical Society. Provided by the NASA Astrophysics Data System.
ID number or DOI: 10.1086/161357
Subjects: Q Science > QB Astronomy
NAU Depositing Author Academic Status: Faculty/Staff
Department/Unit: College of Engineering, Forestry, and Natural Science > Physics and Astronomy
Date Deposited: 30 Sep 2015 17:43
URI: http://openknowledge.nau.edu/id/eprint/418

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