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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
Departamento de Física - CFM - Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil email: School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK
Grażyna Stasińska
LUTH, Observatoire de Paris, PSL, CNRS 92190 Meudon, France
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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.

Contributed Papers
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union


Royal Society–Newton Advanced Fellowship


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