EDP Sciences
Free access
Volume 498, Number 2, May I 2009
Page(s) 357 - 359
Section Cosmology (including clusters of galaxies)
DOI http://dx.doi.org/10.1051/0004-6361/200810687
Published online 05 March 2009
A&A 498, 357-359 (2009)
DOI: 10.1051/0004-6361/200810687

Research Note

Cosmic dark turbulence

A. Nakamichi1 and M. Morikawa2

1  Gunma Astronomical Observatory, 6860-86 Nakayama, Takayama Agatsuma, Gunma 377-0702, Japan
    e-mail: akika@astron.pref.gunma.jp
2  Department of Physics, Ochanomizu University, 2-1-1 Otsuka, Bunkyo, Tokyo 112-8610, Japan

Received 27 July 2008 / Accepted 28 January 2009

We aim for a consistent understanding of various scaling relations reported for self-gravitating systems, based on the proposal that the collisionless dark matter fluid turns into a turbulent state, i.e. dark turbulence, after crossing the caustic surface in the non-linear stage. Kolmogorov scaling laws with a constant energy flow per mass of 0.3 cm2/s3 are suggested from observations.

Key words: cosmology: theory -- gravitation -- turbulence -- cosmology: dark matter -- cosmology: observations -- hydrodynamics

© ESO 2009