期刊
ASTROPHYSICAL JOURNAL
卷 531, 期 2, 页码 739-743出版社
UNIV CHICAGO PRESS
DOI: 10.1086/308484
关键词
galaxies : evolution; galaxies : kinematics and dynamics; plasmas
The statistical equilibrium state of a collisionless system has been derived based on the maximum entropy principle. The result shows that the equilibrium distribution function is a Gaussian distribution in the nondegenerate limit. This result contradicts the Lynden-Bell statistics, which predict a superposition of Fermi distributions as the equilibrium distribution. It is shown that the Lynden-Bell statistics are equivalent to maximizing the entropy calculated from the probability of particle transition, whereas the probability of particle existence should be used to obtain the correct answer.
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