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  RELAXATION OF SPHERICAL SYSTEMS WITH LONG-RANGE INTERACTIONS: A NUMERICAL INVESTIGATION

Di Cintio, P., & Ciotti, L. (2011). RELAXATION OF SPHERICAL SYSTEMS WITH LONG-RANGE INTERACTIONS: A NUMERICAL INVESTIGATION. International Journal of Bifurcation and Chaos, 21(8), 2279-2283.

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 Creators:
Di Cintio, P.1, Author           
Ciotti, L., Author
Affiliations:
1Max Planck Institute for the Physics of Complex Systems, Max Planck Society, ou_2117288              

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 MPIPKS: YB 2012
 Abstract: The process of relaxation of a system of particles interacting with long-range forces is relevant to many areas of physics. For obvious reasons, in Stellar Dynamics much attention has been paid to the case of r(-2) force law. However, recently the interest in alternative gravities has emerged, and significant differences with respect to Newtonian gravity have been found in relaxation phenomena. Here we begin to explore this matter further, by using a numerical model of spherical shells interacting with an r(-alpha) force law obeying the superposition principle. We find that the virialization and phase-mixing times depend on the exponent a, with small values of a corresponding to longer relaxation times, similarly to what happens when comparing for N-body simulations in classical gravity and in Modified Newtonian Dynamics.

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 Dates: 2011-08
 Publication Status: Issued
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 Identifiers: eDoc: 608196
ISI: 000295647500014
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Title: International Journal of Bifurcation and Chaos
Source Genre: Journal
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Pages: - Volume / Issue: 21 (8) Sequence Number: - Start / End Page: 2279 - 2283 Identifier: ISSN: 0218-1274