Orientation of Galactic Bulge Planetary Nebulae toward the Galactic Center

TL;DR

This study investigates the orientations of Galactic bulge planetary nebulae toward the Galactic center using integral field spectroscopy to analyze their velocity distributions.

Contribution

It provides new insights into the spatial orientations of planetary nebulae in the Galactic bulge based on detailed kinematic analysis.

Findings

Some bulge planetary nebulae are aligned toward the Galactic center.

Kinematic features reveal preferred orientations in certain nebulae.

The study enhances understanding of nebular alignment in the Galactic bulge.

Abstract

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.