Turbulence models of gravitational clustering

Details Turbulence models of gravitational clustering Turbulence models of gravitational clustering

2012-02-15

arxiv.org/abs/1202.3402v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

5 pages; contribution to Spanish Relativity Meeting 2011; based on arXiv:1202.3011, with a brief discussion of relativistic as

Scientific paper

Large-scale structure formation can be modeled as a nonlinear process that transfers energy from the largest scales to successively smaller scales until it is dissipated, in analogy with Kolmogorov's cascade model of incompressible turbulence. However, cosmic turbulence is very compressible, and vorticity plays a secondary role in it. The simplest model of cosmic turbulence is the adhesion model, which can be studied perturbatively or adapting to it Kolmogorov's non-perturbative approach to incompressible turbulence. This approach leads to observationally testable predictions, e.g., to the power-law exponent of the matter density two-point correlation function.

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