Open AccessThe H + region contribution to [C ii ] 158‐μm emission
Author(s) -
Abel N. P.
Publication year - 2006
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2006.10282.x
Subject(s) - physics , emission spectrum , ionization , line (geometry) , atomic physics , astrophysics , photodissociation , h ii region , spectral line , ion , astronomy , chemistry , geometry , mathematics , photochemistry , quantum mechanics
The [C ii ] 158‐μm line is an important emission‐line diagnostic in photodissociation regions (PDRs), but this emission line can also emerge from ionized gas. This work calculates the contribution of [C ii ] emission from ionized gas over a wide range of parameter space by considering the simplified case of an H + region and PDR in pressure equilibrium. Additionally, these calculations also predict the strong correlation observed between [N ii ] 205‐μm emission and [C ii ] discussed by previous authors. Overall, the results of these calculations have wide‐ranging applications to the interpretation of [C ii ] emission in astrophysical environments.