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The importance of the diffuse ionized gas for interpreting galaxy spectra

Published online by Cambridge University Press:  29 March 2021

Natalia Vale Asari Open the ORCID record for Natalia Vale Asari [Opens in a new window]  and
Grażyna Stasińska Open the ORCID record for Grażyna Stasińska [Opens in a new window]
Natalia Vale Asari
Affiliation:
Departamento de Física - CFM - Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil email: [email protected] School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK
Grażyna Stasińska
Affiliation:
LUTH, Observatoire de Paris, PSL, CNRS 92190 Meudon, France
Rights & Permissions [Opens in a new window]

Abstract

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Diffuse ionized gas (DIG) in galaxies can be found in early-type galaxies, in bulges of late-type galaxies, in the interarm regions of galaxy disks, and outside the plane of such disks. The emission-line spectrum of the DIG can be confused with that of a weakly active galactic nucleus. It can also bias the inference of chemical abundances and star formation rates in star forming galaxies. We discuss how one can detect and feasibly correct for the DIG contribution in galaxy spectra.

Keywords

ISM: abundancesgalaxies: abundancesgalaxies: ISM
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S359: Galaxy Evolution and Feedback across Different Environments , March 2019 , pp. 371 - 380
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union

Footnotes

†

Royal Society–Newton Advanced Fellowship

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