Filaments (cyan) in M 16 detected by DisPerSE overlaid on the column density map. The Eastern Filament is shown here in green, whilst the Northern Filament is in magenta. The position of the NGC 6611 cluster is depicted by the yellow star. The temperature minimum of the Eastern Filament and the end of the temperature gradient for the Northern Filament, seen in Fig. 5, are indicated by lines perpendicular to the respective filaments. The possible Western Filament (see Sect. 5.1) runs parallel to the Eastern Filament, and the possible continuation to the Northern Filament is indicated by a dashed line.