The Fundamental Straight Line of Galactic Globular Clusters

Details The Fundamental Straight Line of Galactic Globular Clusters The Fundamental Straight Line of Galactic Globular Clusters

1998-02-09

arxiv.org/abs/astro-ph/9802100v1

Astronomy and Astrophysics

Astrophysics

19 pages, latex, 3 .ps figures, latex macro elsart.sty needed. Accepted by New Astronomy

Scientific paper

10.1016/S1384-1076(98)00006-2

A detailed analysis of the Fundamental Plane properties of Globular Cluster is performed. If a sample of ordinary King-model clusters is considered, it is found that, in the "S-space" defined by the parameters (log r_c, log sigma_0, mu_V(0)), their configuration is similar to a straight line. It is shown that, with rather simple assumptions, a simultaneous explanation of all the observed correlations between S-space parameters can be provided. It is suggested that, at earlier times, Globular Clusters populated a line in the three-dimensional S-space, i.e. their original dynamical structure was fully determined by a single physical parameter.

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