1108.5059 (Tassos Bountis et al.)

Complex statistics in Hamiltonian barred galaxy models    [PDF]

Tassos Bountis, Thanos Manos, Chris Antonopoulos

We use probability density functions (pdfs) of sums of orbit coordinates, over time intervals of the order of one Hubble time, to distinguish weakly from strongly chaotic orbits in a barred galaxy model. We find that, in the weakly chaotic case, quasi-stationary states arise, whose pdfs are well approximated by $q$-Gaussian functions (with $1View original: http://arxiv.org/abs/1108.5059