TL;DR
This paper investigates the relationship between the sizes and distances of Galactic globular clusters, finding that orbital shape differences contribute to size distribution scatter, independent of other cluster properties.
Contribution
It reveals that orbit shape variations, rather than luminosity, metallicity, or horizontal branch morphology, influence the size-distance relationship of globular clusters.
Findings
Deviations from the mean R_h versus R_gc relationship do not correlate with luminosity, metallicity, or horizontal branch morphology.
Differences in orbit shape contribute to the scatter in the size-distance relationship.
The study highlights the importance of orbital dynamics in understanding globular cluster sizes.
Abstract
A study is made of deviations from the mean power-law relationship between the Galactocentric distances and the half-light radii of Galactic globular clusters. Surprisingly, deviations from the mean R_h versus R_gc relationship do not appear to correlate with cluster luminosity, cluster metallicity, or horizontal branch morphology. Differences in orbit shape are found to contribute to the scatter in the R_h versus R_gc relationship of Galactic globular clusters.
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