SCYON Abstract

Received on October 20 2003

Dissipationless collapse of a set of N massive particles

Authors	F. Roy(¹) and J. Perez(^1,2)
Affiliation	(¹) Ecole Nationale Supérieure de Techniques Avancées, Unité de Mathématiques Appliquées, 32 Bd Victor, 75015 Paris, France (²) Laboratoire de l'Univers et de ses THéories, Observatoire de Paris-Meudon, 5 place Jules Janssen, 92350 Meudon, France
Accepted by	Monthly Notices of the Royal Astronomical Society
Contact	perez@ensta.fr
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Abstract

The formation of self-gravitating systems is studied by simulating the collapse of a set of N particles which are generated from several distribution functions. We first establish that the results of such simulations depend on N for small values of N. We complete a previous work by Aguilar & Merritt concerning the morphological segregation between spherical and elliptical equilibria. We find and interpret two new segregations: one concerns the equilibrium core size and the other the equilibrium temperature. All these features are used to explain some of the global properties of self-gravitating objects: origin of globular clusters and central black hole or shape of elliptical galaxies.