69 citations · 289 across the 8 of their papers we have counts for
8 papers
The coalescence of invariant manifolds and the spiral structure of barred galaxies
P. Tsoutsis, C. Efthymiopoulos, N. Voglis
In a previous paper (Voglis et al. 2006a, paper I) we demonstrated that, in a rotating galaxy with a strong bar, the unstable asymptotic manifolds of the short period family of uns…
Appropriate SCF basis sets for orbital studies of galaxies and a `quantum-mechanical' method to compute them
Constantinos Kalapotharakos, Christos Efthymiopoulos, Nikos Voglis
We address the question of an appropriate choice of basis functions for the self-consistent field (SCF) method of simulation of the N-body problem. Our criterion is based on a comp…
Orbital structure in N-Body models of barred galaxies
N. Voglis, M. Harsoula, G. Contopoulos
We study the orbital structure of a self-consistent N-body equilibrium configuration of a barred galaxy constructed from cosmological initial conditions. The value of its spin para…
The production of Tsallis entropy in the limit of weak chaos and a new indicator of chaoticity
G. Lukes-Gerakopoulos, N. Voglis, C. Efthymiopoulos
We study the connection between the appearance of a `metastable' behavior of weakly chaotic orbits, characterized by a constant rate of increase of the Tsallis q-entropy (Tsallis 1…
Large scale structure in the HI Parkes All-Sky Survey: Filling the Voids with HI galaxies?
S. Basilakos, M. Plionis, K. Kovac +1
We estimate the two-point correlation function in redshift space of the recently compiled HIPASS neutral hydrogen (HI) sources catalogue, which if modeled as a power law, $ξ(r)=(r_…
Special Features of Galactic Dynamics
Christos Efthymiopoulos, Nikos Voglis, Constantinos Kalapotharakos
The present lecture notes are an introduction to selected topics of {\it Galactic Dynamics}. The focus is on topics that we consider more relevant to the main theme of this worksho…