ar X iv : a st ro - p h / 95 10 09 6 v 1 1 9 O ct 1 99 5 DYNAMICAL FAMILIES IN THE GALACTIC GLOBULAR CLUSTER SYSTEM
نویسندگان
چکیده
The Halo Galactic Globular Clusters (GCs) lying inside the solar circle (Inner , R GC < 8Kpc, [Fe/H] < −0.8) are shown to keep no record of the strong correlation between GC absolute integrated magnitudes and core parameters (concentration and central density) clearly detected for the Halo GCs lying outside this circle (Outer) as well as (at lower statistical significance) for those belonging to the Disk population ([F e/H] > −0.8). We present here both observational evidences and theoretical simulations supporting the hypothesis of a primordial origin for such correlations and of an environment-induced destruction of them if absent. In particular, this hypothesis lead us to argue that Inner Halo GCs have undergone a chaotic, environment-driven, dynamical evolution not shared by the Disk GCs though the radial zone of the Galaxy occupied by the two groups is nearly the same.
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