Observations and 3D Hydrodynamical models of planetary nebulae with Wolf
  Rayet type central stars
  We present high-resolution, long-slit spectroscopic observations of two
planetary nebulae with [WC] central stars located near the galactic bulge, M
1-32 and M 3-15. The observations were obtained with the 2.1-m telescope at the
Observatorio Astron\'omico Nacional, San Pedro M\'artir. M 1-32 shows wide
wings on the base of its emission lines and M 3-15 has two very faint
high-velocity knots. In order to model both PNe we built a three-dimensional
model consisting of a jet interacting with an equatorially concentrated slow
wind, emulating the presence of a dense torus, using the Yguaz\'u
hydrodynamical code. From our hydrodynamical models, we obtained
position-velocity (PV) diagrams in the [N II]$\lambda$6583 line for comparison
with the observations. We find that the spectral characteristics of M 1-32 and
M 3-15 can be explained with the same physical model -a jet moving inside an
AGB wind- using different parameters (physical conditions and position angles
of the jet). In agreement with our model and observations, these objects
contain a dense torus seeing pole-on and a bipolar jet escaping thorough the
poles. Then we propose to classify this kind of objects as spectroscopic
bipolar nebulae, although they have been classified morphologically as compact,
round, or elliptical nebulae or with "close collimated lobes".
