Brightness distribution in globular clusters

Astronomy and Astrophysics – Astronomy

Scientific paper

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Brightness Distribution, Globular Clusters, Star Clusters, Astronomical Catalogs, Astronomical Models, Astronomical Photometry, Distribution Functions, Radii

Scientific paper

The globular clusters NGC 5024, 5272, 5904, 6205, 6218, 6254, 6341, 6402, 6712, 7078, 7089 were scanned in B and V bands by a long narrow slit oriented along the meridian. By means of comparison with King's model and a generalized isochronic model, their structural parameters are deduced. The core radii Rc are systematically less than the radii obtained earlier by star counts and photoelectric integral photometry. The conclusion of Veltmann et al., that central concentration q in a generalized isochronic model gives the preference to values q = 0, 1/2, 1, is not confirmed by the authors' observations.

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