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F. Bigiel, I. de Looze, A. Krabbe, D. Cormier, A. T. Barnes, C. Fischer, A. D. Bolatto, A. Bryant, S. Colditz, N. Geis, R. Herrera-Camus, C. Iserlohe, R. Klein, A. K. Leroy, H. Linz, L. W. Looney, S. C. Madden, A. Poglitsch, J. Stutzki, and W. D. Vacca
Uni Bonn

Full-disk SOFIA/FIFI-LS CII Observations in Local Spiral Galaxies

I will present results from a recent publication and ongoing work in our group with SOFIA/FIFI-LS, illustrating the future potential of full-disk CII observations  across a sample of nearby galaxies. The focus will be on the nearby, molecular gas-rich and very actively star forming spiral galaxy NGC 6946. I will discuss spectral line stacking as a tool to extract high signal-to-noise measurements across different regions (spiral arms, interarm region and center) and radial trends across the galaxy disk. The latter include ancillary data from atomic and molecular gas as well as star formation rate tracers and key CII line ratios, such as CII/TIR, CII/CO or CII/I_PAH. In addition, I will show results for individual, approximately kpc-sized regions across the galaxy disk with a focus on CII/SFR and CII/CO ratios and discuss environmental differences of these ratios and their interpretation.