Tracing the total molecular gas in galaxies: [CII] and the CO-dark gas
Tracing the total molecular gas in galaxies: [CII] and the CO-dark gas
Context. Molecular gas is a necessary fuel for star formation. The CO (1−0) transition is often used to deduce the total molecular hydrogen but is challenging to detect in low-metallicity galaxies in spite of the star formation taking place. In contrast, the [C II ] λ 158 μ m is …