EAS Publications Series
Volume 36, 2009Dark Energy and Dark Matter: Observations, Experiments and Theories
|Page(s)||141 - 146|
|Published online||30 May 2009|
E. Pécontal, T. Buchert, Ph. Di Stefano and Y. Copin (eds)
EAS Publications Series, 36 (2009) 141-146
Cosmological dark turbulence and scaling relations in self-gravitating systems
Gunma Astronomical Observatory, 6860-86 Nakayama, Agatsuma, Gunma
2 Department of Physics, Ochanomizu University, 2-1-1 Bunkyo, Tokyo 112-8610, Japan
Many scaling relations have been observed for self-gravitating systems (SGS) in the universe. We explore a consistent understanding of them from a simple principle based on the proposal that the collision-less dark matter (DM) fluid terns into a turbulent state, i.e. dark turbulence, after crossing the caustic surface in the non-linear stage. After deriving Kolmogorov scaling laws from Navier-Stokes and Jeans equations by the method used in solving the Smoluchowski coagulation equation, we apply this to several observations such as the scale-dependent velocity dispersion, mass-luminosity ratio, and mass-angular momentum relation. They all point the concordant value for the constant energy flow per mass: 0.3 cm2/s3, which may be understood as the speed of the hierarchical coalescence process in the cosmic structure formation.
© EAS, EDP Sciences, 2009
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