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• W2332114686 abstract "Self-gravitating systems, like globular clusters or elliptical galaxies, are the prototypes of many-body systems with long-range interactions, and should be the natural arena where to test theoretical predictions on the statistical behaviour of long-range-interacting systems. Systems of classical self-gravitating particles can be studied with the standard tools of equilibrium statistical mechanics, provided the potential is regularized at small length scales and the system is confined in a box. The confinement condition looks rather unphysical in general, so that it is natural to ask whether what we learn with these studies is relevant to real self-gravitating systems. In order to provide a first answer to this question we consider a basic, simple, yet effective model of globular clusters, the King model. This model describes a self-consistently confined system, without the need of any external box, but the stationary state is a non-thermal one. In particular, we consider the King model with a short-distance cutoff on the interactions and we discuss how such a cutoff affects the caloric curve, i.e. the relation between temperature and energy. We find that the cutoff stabilizes a low-energy phase which is absent in the King model without cutoff; the caloric curve of the model with cutoff turns out to be very similar to that of previously studied confined and regularized models, but for the absence of a high-energy gas-like phase. We briefly discuss the possible phenomenological as well as theoretical implications of these results." @default.
• W2332114686 created "2016-06-24" @default.
• W2332114686 creator A5066062951 @default.
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• W2332114686 date "2012-06-05" @default.
• W2332114686 modified "2023-09-26" @default.
• W2332114686 title "Caloric curve of star clusters" @default.
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• W2332114686 doi "https://doi.org/10.1103/physreve.85.061105" @default.
• W2332114686 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23005049" @default.
• W2332114686 hasPublicationYear "2012" @default.
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