Orientation of Galactic Bulge Planetary Nebulae toward the Galactic   Center
  We have used the Wide Field Spectrograph on the Australian National University 2.3-m telescope to perform the integral field spectroscopy for a sample of the Galactic planetary nebulae. The spatially resolved velocity distributions of the H$\alpha$ emission line were used to determine the kinematic features and nebular orientations. Our findings show that some bulge planetary nebulae toward the Galactic center have a particular orientation. 
A. Danehkar, Q. A. Parker
astro-ph.GA