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The masses of globular clusters. I. Surface brightness distributions and star counts.

1976; Institute of Physics; Volume: 30; Linguagem: Inglês

10.1086/190360

1538-4365

G. D. Illingworth, W. Illingworth,

Astronomy and Astrophysical Research

view Abstract Citations (95) References (63) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The masses of globular clusters. I. Surface brightness distributions and star counts. Illingworth, G. ; Illingworth, W. Abstract Surface brightness distributions have been determined for 10 globular clusters from photo- electric surface photometry using centered apertures and small-aperture drift scans across the clusters. Star counts have been used to extend the distributions in the outer regions. Tile observed distributions are compared with the theoretical surface density distributions from King's models of globular clusters. Central surface brightnesses, core radii, tidal radii, and total magnitudes derived from this comparison are tabulated, as are the parameters which will be used in Paper II, in conjunction with the central velocity dispersion, to give masses and MIL values for these clusters. Reddenings and distance moduli determined from consideration of all available data are also given. Subject headings: clusters: globular - stars: stellar dynamics - stars: stellar statistics Publication: The Astrophysical Journal Supplement Series Pub Date: March 1976 DOI: 10.1086/190360 Bibcode: 1976ApJS...30..227I full text sources ADS | data products SIMBAD (13) Related Materials (1) Part 2: 1976ApJ...204...73I