Kinematical Properties of Planetary Nebulae with WR-type Nuclei

TL;DR

This study uses integral field spectroscopy to analyze the three-dimensional gas structures of planetary nebulae with Wolf-Rayet nuclei, revealing predominantly axisymmetric morphologies and dynamic features such as fast low-ionization regions.

Contribution

It provides detailed kinematic and morphological analysis of PNe with WR-type nuclei, enhancing understanding of their 3D structures and gas dynamics.

Findings

Most PNe are axisymmetric, either bipolar or elliptical.

Kinematic maps show presence of fast low-ionization emission regions.

Reveals complex gas motions linked to central star types.

Abstract

We have carried out integral field unit (IFU) spectroscopy of H$\alpha$, [N II] and [O III] emission lines for a sample of Galactic planetary nebulae (PNe) with Wolf-Rayet (WR) stars and weak emission-line stars (wels). Comparing their spatially-resolved kinematic observations with morpho-kinematic models allowed us to disentangle their three-dimensional gaseous structures. Our results indicate that these PNe have axisymmetric morphologies, either bipolar or elliptical. In many cases the associated kinematic maps for the PNe around hot central stars also reveal the presence of so-called fast low-ionization emission regions.