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We present first results from the Herschel Gould Belt survey for theB211/L1495 region in the Taurus molecular cloud. Thanks to their highsensitivity and dynamic range, the Herschel images reveal the structure of thedense, star-forming filament B211 with unprecedented detail, along with thepresence of striations perpendicular to the filament and generally orientedalong the magnetic field direction as traced by optical polarization vectors.Based on the column density and dust temperature maps derived from the Herscheldata, we find that the radial density profile of the B211 filament approaches apower-law behavior {\rho} {\propto} r^(-2.0{\pm}0.4) at large radii and thatthe temperature profile exhibits a marked drop at small radii. The observeddensity and temperature profiles of the B211 filament are in good agreementwith a theoretical model of a cylindrical filament undergoing gravitationalcontraction with a polytropic equation of state: P {\propto} {\rho}^{\gamma}and T {\propto} {\rho}^({\gamma}-1), with {\gamma}=0.97{\pm}0.01<1 (i.e. notstrictly isothermal). The morphology of the column density map, where some ofthe perpendicular striations are apparently connected to the B211 filament,further suggests that the material may be accreting along the striations ontothe main filament. The typical velocities expected for the infalling materialin this picture are ~0.5-1 km/s, which are consistent with the existingkinematical constraints from previous CO observations.

Herschel view of the Taurus B211/3 filament and striations: Evidence of filamentary growth?