Authors:
Aller, A.;Vázquez, R.;Olguín, L.;Miranda, L. F.;Ressler, M. E.
Journal:
Monthly Notices of the Royal Astronomical Society
Abstract:
We present high-resolution, long-slit optical spectra and images of the planetary nebula NGC 1514. The position velocity maps of the [O III] 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 NGC 1514 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 analyse intermediate-resolution, long-slit spectra with the goal of studying the physical parameters and chemical abundances of NGC 1514. The nebular spectra reveal a moderate-excitation nebula with weak emission lines of [Ar III], [Ne III], He I, and He II. Neither [N II] nor other low-excitation emission lines are detected. We found an electron temperature around 14 000 K in the gas and an electron density in the range of 2000-4000 cm<SUP>-3</SUP>.
URL:
https://ui.adsabs.harvard.edu/#abs/2021MNRAS.504.4806A/abstract
Keywords:
ISM: abundances;ISM: kinematics and dynamics;planetary nebulae: individual: NGC 1514;Astrophysics - Solar and Stellar Astrophysics;Astrophysics - Astrophysics of Galaxies