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2005 | 3 | 3 | 376-381

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Hydrostatic equilibrium and Tsallis’ equilibrium for self-gravitating systems



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Self-gravitating systems are generally thought to behavior non-extensively due to the long-range nature of gravitational forces. We discuss a relation between the nonextensive parameter q of Tsallis statistics, the temperature gradient and the gravitational potential based on the equation of hydrostatic equilibrium for self-gravitating systems. It is suggested that the nonextensive parameter in Tsallis statistics has a clear physical meaning with regard to the non-isothermal nature of the systems with long-range interactions. Tsallis’ equilibrium distribution for the self-gravitating systems describes the property of hydrostatic equilibrium of the systems.










Physical description


1 - 9 - 2005
1 - 9 - 2005


  • Department of Physics, School of Science, Tianjin University, 300072, Tianjin, China


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