Abstract
view Abstract Citations (17) References (13) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The structure of eight globular clusters. Bahcall, N. A. ; Hausman, M. A. Abstract Star counts on short-exposure plates are presented for eight globular clusters. The data are given to several limiting magnitudes for each cluster. Projected radial distributions are determined from the star counts; no significant segregation is observed among the distributions to various limiting magnitudes. The structural parameters of the clusters (core radii and concentration factors) are determined from best-fitting King curves to the observed distributions. The central densities, total masses, central escape velocities, and relaxation times are also calculated. NGC 6093 (M80) and NGC 7099 (M30) have dense compact stellar cores, similar to the established globular X-ray sources. Upper limits are given for the masses of possible central black holes in the eight clusters. Publication: The Astrophysical Journal Pub Date: April 1977 DOI: 10.1086/155132 Bibcode: 1977ApJ...213...93B Keywords: Black Holes (Astronomy); Globular Clusters; Radial Distribution; Star Distribution; X Ray Sources; Escape Velocity; Galactic Structure; Relaxation Time; Stellar Mass; Astrophysics full text sources ADS |
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