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Limits to Ionization-parameter Mapping as a Diagnostic of HII Region Optical Depth

  • Authors: Amit N. Sawant, Eric W. Pellegrini, M. S. Oey, Jesús López-Hernández, Genoveva Micheva

Amit N. Sawant et al 2021 The Astrophysical Journal 923 .

  • Provider: AAS Journals

Caption: Figure 6.

BCLMP 668 in smoothed, unsharp-masked (a) continuum-subtracted Hα, (b) [O III]/[O II], and (c) [O III]/[S II] ratio maps. Color bar units are in image counts. This object is classified as optically thick, and displays a shell-like structure of high- vs. low-ionization zones.

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