High-resolution (18.2′′) column density map of the Taurus B211+L1495 field derived from the Herschel data. The contrast of filamentary structures has been enhanced using a curvelet transform (cf. Starck et al. 2003). Given the typical width ~0.1 pc of the filaments (Arzoumanian et al. 2011), this map is approximately equivalent to a map of mass per unit length along the filaments. The color bar on the right shows a line-mass scale in units of the thermal critical line mass of Inutsuka & Miyama (1997), which we estimate to be accurate to better than a factor of ~2 according to a detailed analysis of the radial profiles of the filaments (Arzoumanian et al., in prep.). Note that the main B211 filament is thermally supercritical, while the mass per unit length of the faint striations is an order of magnitude below the critical value.
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