Dynamical Families in the Galacti Globular Cluster System

Details Dynamical Families in the Galacti Globular Cluster System Dynamical Families in the Galacti Globular Cluster System

1995-10-19

arxiv.org/abs/astro-ph/9510096v1

Astronomy and Astrophysics

Astrophysics

16 pages, 2 tables, plain TEX, 6 figures available via ftp://boas3.bo.astro.it bap/files/ , get bap95-41-fig*.ps or HTTP://w

Scientific paper

The Halo Galactic Globular Clusters (GCs) lying inside the solar circle (\inn, \r $< 8 Kpc$, \feh$<-0.8$) 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 (\out) as well as (at lower statistical significance) for those belonging to the \dis population ($\feh >-0.8$). We present here both observational evidences and theoretical simulations supporting the hypothesis of a {\it primordial} origin for such correlations and of an {\it environment-induced} destruction of them if absent. In particular, this hypothesis lead us to argue that \inn Halo GCs have undergone a chaotic, environment-driven, dynamical evolution not shared by the \dis GCs though the radial zone of the Galaxy occupied by the two groups is nearly the same.

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