Orbits of selected globular clusters in the Galactic bulge
  We present orbit analysis for a sample of 8 inner bulge globular clusters,
together with one reference halo object. We used proper motion values derived
from long time base CCD data. Orbits are integrated in both an axisymmetric
model and a model including the Galactic bar potential. The inclusion of the
bar proved to be essential for the description of the dynamical behavior of the
clusters. We use the Monte Carlo scheme to construct the initial conditions for
each cluster, taking into account the uncertainties in the kinematical data and
distances. The sample clusters show typically maximum height to the Galactic
plane below 1.5 kpc, and develop rather eccentric orbits. Seven of the bulge
sample clusters share the orbital properties of the bar/bulge, having
perigalactic and apogalatic distances, and maximum vertical excursion from the
Galactic plane inside the bar region. NGC 6540 instead shows a completely
different orbital behaviour, having a dynamical signature of the thick-disc.
Both prograde and prograde-retrograde orbits with respect to the direction of
the Galactic rotation were revealed, which might characterize a chaotic
behaviour.
