Gravothermal Aspects in Evolution of the Stars and the Universe
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概要
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In celestial bodies and the universe self-gravity plays an essential role in determining their nature and evolution. Global thermodynamics of such self-gravitating systems is discussed. They exhibit thermodynamically peculiar nature such as negative specific heat, and, depending on parameters involved, they have no state of stable thermal equilibrium within the framework of Newtonian gravity. The expansion of the universe produces a change in the thermodynamic boundary conditions for subsystems embedded in the universe. Such situations are related with the origin of their evolution (or, in other words, emergence of diversities, orders or spatial structures) and generation of information. Such phenomena are known in relation to stellar evolution, gravothermal catastrophe of self-gravitating systems (star itself or gravitational many body system), formation of black holes and evolution of the universe. Their inter-relations are clarified from the standpoint of thermodynamics of self-gravitating systems, black holes, dissipative open systems and irreversible processes, and of cosmology. It is shown that the expansion of the universe and the effect of self-gravity are essential in generation of information and as a ponderamotive force of evolution. The laws of physics including the second law of thermodynamics hold even in such processes. Thus, the generation of information is formulated rigorously, while the concept of evolution can be defined not in a simple and unique fashion but in relation with "apparent" concept of common sense in which some interaction is overlooked.
- 理論物理学刊行会の論文
- 1982-03-01
著者
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HACHISU Izumi
Department of General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo
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Hachisu Izumi
Department Of Aeronautical Engineering Kyoto University
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SUGIMOTO Daiichiro
Department of Earth Science and Astronomy College of General Education, University of Tokyo
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ERIGUCHI Yoshiharu
Department of Earth Science and Astronomy College of General Education, University of Tokyo
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Sugimoto Daiichiro
Department Of Earth Science And Astronomy University Of Tokyo
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Eriguchi Yoshiharu
Department Of Earth Science And Astronomy University Of Tokyo
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Eriguchi Yoshiharu
Department Of Earth Science And Astronomy College Of General Education University Of Tokyo
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Sugimoto Daiichiro
Department Of Earth Science And Astronomy College Of General Education University Of Tokyo
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HACHISU Izumi
Department of Eaarth Sience and Astronomy College of General Education, University of Tokyo
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ERIGUCHI Yoshiharu
Department of Earth Science and Astronomy Graduate School of Arts and Science, University of Tokyo
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Sugimoto Daiichiro
Department of General Systems Studies, College of Arts and Sciences, The University of Tokyo
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