Evidence of [CII] Shocked Emission in NGC 7479

By Dario Fadda and Joan Schmelz

Paper: [C II] and CO Emission along the Bar and Counter-arms of NGC 7479
Fadda, Dario, et al., 2021/03, ApJ, 909, 204.

SOFIA observations of the barred spiral galaxy, NGC 7479, were able to separate shock-enhanced ionized carbon [CII] emission from that associated with star formation, reminding us that it is important to consider multiple mechanisms when studying the [CII] emission in galaxies with active nuclei.

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The Optical Depth of [CII]: the Implications for Galaxies both Near and Far

By Cristian Guevara and Joan Schmelz

Paper: [C II] 158 µm self-absorption and optical depth effects
Guevara, C., et al., 2020/04, A&A, 636A, A16.

Photodissociation Regions (PDRs) are zones of the interstellar medium in which Far-UV photons dominate the thermal balance, chemistry, structure, as well as the distribution of the gas and dust. The incident FUV field photodissociates molecules, photoionizes atoms and molecules, and heats the gas and dust.

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