The warm ionized medium in spiral galaxies
L. M. Haffner, R.-J. Dettmar, J. E. Beckman, K. Wood, J. D. Slavin, C., Giammanco, G. J. Madsen, A. Zurita, R. J. Reynolds
TL;DR
This review discusses the observations and models of diffuse ionized gas in spiral galaxies, highlighting its properties, distribution, and significance in the interstellar medium, inspired by a scientific session honoring Professor Carl Heiles.
Contribution
It provides a comprehensive synthesis of current knowledge on the warm ionized medium in spiral galaxies, emphasizing observational data and theoretical models.
Findings
Diffuse ionized gas is prevalent in galaxy disks and halos.
Models suggest multiple ionization sources and complex structures.
Observations support the importance of ionized gas in galactic ecosystems.
Abstract
This article reviews observations and models of the diffuse ionized gas that permeates the disk and halo of our Galaxy and others. It was inspired by a series of invited talks presented during an afternoon scientific session of the 65th birthday celebration for Professor Carl Heiles held at Arecibo Observatory in August 2004. This review is in recognition of Carl's long standing interest in and advocacy for studies of the ionized as well as the neutral components of the interstellar medium.
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