惹人反感 发表于 2025-3-25 06:07:31

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champaign 发表于 2025-3-25 08:25:40

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书法 发表于 2025-3-25 12:29:23

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intuition 发表于 2025-3-25 16:42:15

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FANG 发表于 2025-3-25 20:28:15

https://doi.org/10.1007/978-1-4613-9898-1al of the disk to the gravitational potential of the main spiral arms. The peculiarities of the potential in the narrow transitional annulus between the regions of spiral and multipole behavior can explain basic characteristic features of the quarter-turn spirals (their angular length and small pitch angles).

合唱队 发表于 2025-3-26 02:11:00

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HPA533 发表于 2025-3-26 04:34:27

Wolfgang Bauer,Gary D. Westfalling moments form a closed system of three highly-symmetric coupled first-order partial differential equations in three variables. They were first derived by Lynden-Bell in 1960, but have resisted solution by standard methods. Here we present the general solution by superposition of singular solutions.

Circumscribe 发表于 2025-3-26 09:03:41

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accomplishment 发表于 2025-3-26 16:41:26

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obnoxious 发表于 2025-3-26 17:36:55

https://doi.org/10.1007/978-1-4757-4401-9tic deviations from strict homology occur in the structure and dynamics of bright elliptical galaxies. In addition, I will discuss possible mechanisms of dynamical evolution for these systems, in the light of some classical thermodynamical arguments and of recent N-body simulations for stellar systems under the influence of weak collisionality.
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查看完整版本: Titlebook: Galaxies and Chaos; George Contopoulos,Nikos Voglis Book 2003 Springer-Verlag Berlin Heidelberg 2003 Celestial mechanics.Galaxy.dynamical