Profiles of the dense front at the north of the main ionizing sources and profiles of the pillars traced by DisPerSe in M 16. The extension of the profiles is fixed at 3 parsecs. The yellow shaded area represents the standard deviation of the profiles. The red sign Hα indicates on which side ionized gas is present (see also Fig. 9 and the Hα emission). The green-dashed curve is the Gaussian fit used to determine the FWHM width.
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