Radial profiles of observed and derived physical quantities along the outflow cavities associated with L1551 IRS5 - redshifted outflow, left panels (a-d); blueshifted outflow, right panels (e-h). From top to bottom: Dust temperature profiles derived in Sect. 3.1 (panels a, e); Brightness temperature observed with ALMA at 1.3 mm (green dots) and 3.0 mm (blue dots; panels b, f) at the resolution of $1\stackrel{″}{.}0$; Associated optical depth (panels c, g); Dust spectral index (α_mm) and emissivity index (β_mm) derived at the angular resolution of $0\stackrel{″}{.}5$ (violet dots) and at $1\stackrel{″}{.}0$ (pink hexagons; panels d, h).