69 citations · 289 across the 8 of their papers we have counts for
7 papers · 1 filter
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…
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…
Invariant manifolds, phase correlations of chaotic orbits and the spiral structure of galaxies
Nikos Voglis, Panagiotis Tsoutsis, Christos Efthymiopoulos
In the presence of a strong component in a rotating galaxy, the phase space structure near corotation is shaped to a large extent by the {\it invariant manifolds} of the shor…