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Planetary nebulae in the (extra)-galactic context: Probing chemical evolution in star-forming galaxies

Published online by Cambridge University Press:  30 December 2019

Letizia Stanghellini
Letizia Stanghellini*
Affiliation:
National Optical Astronomy Observatory 950 N. Cherry Avenue Tucson, Arizona 85719 (USA) email: lstanghellini@noao.edu
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Abstract

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The populations of planetary nebulae (PNe) probe metallicity and chemical content (and its evolution) of the parent galaxy, giving clues to galaxy formation and evolution. This sub-field of extra-galactic PN research has been particularly active in the recent years. Comparison of data and models yielded estimates of global cosmic enrichment and provided constraints to galaxy formation history. In external spiral galaxies, the chemical contents of PNe and H II regions can be compared to disclose possible evolution of the radial metallicity gradient, which is, in turn, a powerful constraint to galactic chemical evolutionary models. In the Milky Way, recent PN progenitor dating and new chemical abundances offer an updated look into our own Galaxy. Collectively, Galactic and extra-galactic radial metallicity gradients from emission-line probes (PNe and H II regions) can be compared to have a cosmological outlook on galactic evolution.

Keywords

Planetary nebulae
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S343: Why Galaxies Care About AGB Stars: A Continuing Challenge through Cosmic Time , August 2018 , pp. 174 - 180
Copyright
© International Astronomical Union 2019 

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