The case for thermalization as a contributor to the [C ii] deficit. - Sutter, Jessica; Dale, Daniel A; Sandstrom, Karin; Smith, J D T; Bolatto, Alberto; Boquien, Mederic; Calzetti, Daniela; Croxall, Kevin V; De Looze, Ilse; Galametz, Maud; Groves, Brent A; Helou, George; et al. (Monthly Notices of the Royal Astronomical Society, 2021)