Structural parameters and luminosities of globular clusters

Details Structural parameters and luminosities of globular clusters Structural parameters and luminosities of globular clusters

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pasp...99...20p&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 99, Jan. 1987, p. 20-26. NSERC-supported research.

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Astronomical Photometry, Globular Clusters, Stellar Luminosity, Stellar Structure, Astronomical Catalogs, Electrophotometry, Stellar Cores, Ubv Spectra

Scientific paper

The theoretical models of King (1966) are fit to visual photometric data on 106 globular clusters from the Catalog of Concentric Aperture UBVRI Photoelectric Photometry of Globular Clusters (Peterson, 1986) to determine the core radii, concentration classes, central surface brightnesses, and total cluster magnitudes. The results are presented in tables and graphs and compared with those of previous analyses. The present core radii are found to be systematically smaller, by about 0.1 dex in log r(c)-prime, than those reported by Peterson and King (1975) and Peterson (1976) and to be in good agreement with those of Kron et al. (1983). It is pointed out that accurate determination of cluster concentration class still requires the use of other types of data (e.g., star counts).

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