The morpho-kinematical structure and chemical abundances of the complex planetary nebula NGC 1514

TL;DR

This study provides a detailed analysis of NGC 1514's complex structure and chemical composition using high-resolution spectra, revealing multiple shells, possible ejection processes, and moderate excitation conditions.

Contribution

It offers the first detailed morpho-kinematical model of NGC 1514 and analyzes its chemical abundances, highlighting complex structures and formation processes.

Findings

Inner shell distorted by bubbles

Presence of two infrared rings not kinematically detected

Electron temperature around 14000K, density 2000-4000 cm^-3

Abstract

We present high-resolution, long-slit optical spectra and images of the planetary nebula NGC1514. The position velocity maps of the [OIII] emission line reveal complex kinematics with multiple structures. A morpho-kinematical analysis suggests an inner shell, originally spherical and now distorted by several bubbles, and an attached outer shell. The two well-defined, mid-infrared rings of NGC1514 are not detected in our high-resolution, long-slit spectra, which prevented us from doing a kinematical analysis of them. Based exclusively on their morphology, we propose a barrel-like structure to explain the rings. Several ejection processes have been possibly involved in the formation of the nebula although a time sequence is difficult to establish with the current data. We also analyze intermediate-resolution, long-slit spectra with the goal of studying the physical parameters and chemical abundances of NGC1514. The nebular spectra reveal a moderate-excitation nebula with weak emission lines of [ArIII], [NeIII], HeI and HeII. No [NII] neither other low-excitation emission lines are detected. We found an electron temperature around 14000K in the gas and an electron density in the range of 2000 and 4000 cm$^{-3}$.