Collapsed mean cross sections for the four rim regions displayed in Fig. 2, showing the variation of extinction, c, AV/NH and Ne (cm-3) with relative offset across the rim (solid lines), and for rim region 1 (dashed lines); cf., Fig. 4. The dust-to-gas ratio AV/NH is expressed as a fraction of the ISM value of 5.07 × 10-22 mag cm-2 from Gudennavar et al. (2012).
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