Ionized gas in the Scutum spiral arm as traced in [N ii] and [C ii]W. D. Langer, T. Velusamy, P. F. Goldsmith, J. L. Pineda, E. T. Chambers, G. Sandell, C. Risacher and K. JacobsA&A, 607 (2017) A59DOI: https://doi.org/10.1051/0004-6361/201731198
