Peanuts, brezels and bananas: food for thought on the orbital structure
  of the Galactic bulge
  Recent observations have discovered the presence of a Box/Peanut or X-shape
structure in the Galactic bulge. Such Box/Peanut structures are common in
external disc galaxies, and are well-known in N-body simulations where they
form following the buckling instability of a bar. From studies of analytical
potentials and N-body models it has been claimed in the past that Box/Peanut
bulges are supported by "bananas", or x1v1 orbits. We present here a set of
N-body models where instead the peanut bulge is mainly supported by brezel-like
orbits, allowing strong peanuts to form with short extent relative to the bar
length. This shows that stars in the X-shape do not necessarily stream along
banana orbits which follow the arms of the X-shape. The brezel orbits are also
found to be the main orbital component supporting the peanut shape in our
recent Made-to-Measure dynamical models of the Galactic bulge. We also show
that in these models the fraction of stellar orbits that contribute to the
X-structure account for 40-45% of the stellar mass.
