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We obtained Herschel PACS and SPIRE images of the thermal emission of thedebris disk around the A5V star {\beta} Pic. The disk is well resolved in thePACS filters at 70, 100, and 160 {\mu}m. The surface brightness profilesbetween 70 and 160 {\mu}m show no significant asymmetries along the disk, andare compatible with 90% of the emission between 70 and 160 {\mu}m originatingin a region closer than 200 AU to the star. Although only marginally resolvingthe debris disk, the maps obtained in the SPIRE 250 - 500 {\mu}m filtersprovide full-disk photometry, completing the SED over a few octaves inwavelength that had been previously inaccessible. The small far-infraredspectral index ({\beta} = 0.34) indicates that the grain size distribution inthe inner disk (<200AU) is inconsistent with a local collisional equilibrium.The size distribution is either modified by non-equilibrium effects, orexhibits a wavy pattern, caused by an under-abundance of impactors which havebeen removed by radiation pressure.

The {\beta} Pictoris disk imaged by Herschel PACS and SPIRE