(Left) Map of the velocity-integrated SiO emission in the Cep E jet obtained at 2″ resolution with the Plateau de Bure interferometer (PdBI; Lefloch et al., in prep.). The SiO J = 2 → 1 emission integrated between  + 40 and  + 80kms^-1 (−90 and  −40kms^-1) is drawn in solid (dashed) contours, superposed on the 3 mm continuum emission map (grayscale and white contours). First contour and contour interval of the jet emission are 10^-2 and 5 × 10^-3 (10^-2) Jy/beam for the redshifted (blueshifted) emission. First contour and contour interval of the 3 mm continuum emission is 2 × 10^-3   Jy/beam. The main beam of the IRAM 30 m telescope at the frequency of the p-H₂O 3₁₃ − 2₂₀ line is marked by a circle (dashed). The synthesized beam of the PdBI (2.4″ × 2.0″) is indicated as a filled ellipse in the bottom right corner. (Right) Comparison of the PdBI SiO J = 2 → 1 and the average spectra towards the protostar. Intensities are expressed in units of antenna temperature.