Chemical abundances in Galactic planetary nebulae from faint emission lines
arXiv:1612.02568
Abstract
Deep spectrophotometry has proved to be a fundamental tool to improve our knowledge on the chemical content of planetary nebulae. With the arrival of very efficient spectrographs installed in the largest ground-based telescopes, outstanding spectra have been obtained. These data are essential to constrain state-of-the-art nucleosynthesis models in asymptotic giant branch stars and, in general, to understand the chemical evolution of our Galaxy. In this paper we review the last advances on the chemical composition of the ionized gas in planetary nebulae based on faint emission lines observed through very deep spectrophotometric data.
Invited review in workshop "Chemical abundances in ionized nebulae" held in Campos do Jordao, Brazil between 3-5 November 2016. To be published in BAAA. G. Hägele, M. Cardaci and E. Pérez-Montero eds. 10 pages, 2 figures