Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-03-19
Mon.Not.Roy.Astron.Soc. 348 (2004) 589-598
Astronomy and Astrophysics
Astrophysics
Scientific paper
10.1111/j.1365-2966.2004.07360.x
We review a range of stastistical methods for analyzing the structures of star clusters, and derive a new measure ${\cal Q}$ which both quantifies, and distinguishes between, a (relatively smooth) large-scale radial density gradient and multi-scale (fractal) sub-clustering. Q is derived from the normalised correlation length and the normalised edge length of the minimal spanning tree for each cluster.
Cartwright Annabel
Whitworth Anthony P.
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