The survey for ionization in neutral gas galaxies. III. Diffuse, warm ionized medium and escape of ionizing radiation

MS Oey; GR Meurer; S Yelda; EJ Furst; SM Caballero-Nieves; DJ Hanish; EM Levesque; DA Thilker; GL Walth; J Bland-Hawthorn; MA Dopita; HC Ferguson; TM Heckman; MT Doyle; MJ Drinkwater; KC Freeman; RC Kennicutt; VA Kilborn; PM Knezek; B Koribalski; M Meyer; ME Putman; EV Ryan-Weber; RC Smith; L Staveley-Smith; RL Webster; J Werk; MA Zwaan

Journal article

The survey for ionization in neutral gas galaxies. III. Diffuse, warm ionized medium and escape of ionizing radiation

MS Oey, GR Meurer, S Yelda, EJ Furst, SM Caballero-Nieves, DJ Hanish, EM Levesque, DA Thilker, GL Walth, J Bland-Hawthorn, MA Dopita, HC Ferguson, TM Heckman, MT Doyle, MJ Drinkwater, KC Freeman, RC Kennicutt, VA Kilborn, PM Knezek, B Koribalski Show all

Astrophysical Journal | Published : 2007

DOI: 10.1086/517867

Abstract

We use the first data release from the SINGG Hα survey of H I-selected galaxies to study the quantitative behavior of the diffuse, warm ionized medium (WIM) across the range of properties represented by these 109 galaxies. The mean fraction fWIM of diffuse ionized gas in this sample is 0.59 ± 0.19, slightly higher than found in previous samples. Since lower surface brightness galaxies tend to have higher fWIM, we believe that most of this difference is due to selection effects favoring large, optically bright, nearby galaxies with high star formation rates. As found in previous studies, there is no appreciable correlation with Hubble type or total star formation rate. However, we find that s..

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