Open AccessApproximate dynamics of dark matter ellipsoids
Author(s) -
BisnovatyiKogan G. S.,
Tsupko O. Yu.
Publication year - 2005
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2005.09614.x
Subject(s) - physics , ellipsoid , angular momentum , dark matter , classical mechanics , instability , differential rotation , spheroid , ordinary differential equation , dynamics (music) , cold dark matter , gravitational collapse , mechanics , differential equation , astrophysics , stars , astronomy , quantum mechanics , biochemistry , chemistry , acoustics , in vitro
The collapse of non‐collisional dark matter and the formation of pancake structures in the Universe are investigated approximately. Collapse is described by a system of ordinary differential equations, in the model of a uniformly rotating, three‐axis, uniform density ellipsoid. Violent relaxation, mass and angular momentum losses are taken into account phenomenologically. The formation of the equilibrium configuration, secular instability and the transition from a spheroid to a three‐axis ellipsoid are investigated numerically and analytically in this dynamical model.