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.
Comment: 2 pages, 1 figure, presented as a poster at the IAU Symposium 312 "Star Clusters and Black Holes in Galaxies across Cosmic Time", Beijing, China, 2014