Self-Gravitating N-Body Systems out of Equilibrium

Details Self-Gravitating N-Body Systems out of Equilibrium Self-Gravitating N-Body Systems out of Equilibrium

2000-10-19

arxiv.org/abs/astro-ph/0010383v1

Astronomy and Astrophysics

Astrophysics

2 pages, to be published in the proceedings of "Galactic Structure, Stars and the Interstellar medium", eds. Woodward C.M, Bic

Scientific paper

Real physical systems are often maintained off equilibrium by energy or matter flows. If these systems are far from equilibrium then the thermodynamical branch become unstable and fluctuations can lead them to other more stable states. These new states are often endowed with higher degrees of organization. In order to explore whether an energy-flow in combination with self-gravity can lead to complex, inhomogeneous structures, like observed in the interstellar medium (ISM), we perform N-body simulations of self-gravitating systems subjected to an energy-flow. Moreover we perform some simple gravo-thermal N-body experiments and compare them with theoretical results. We find negative specific heat in an energy range as predicted by Follana & Laliena (1999).

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