Left: CO J= 2–1 emission detected in the Cep E protostellar core with the IRAM interferometer at 1″ (820 au) resolution. The black contours trace the emission from the low-velocity gas (|V −V_lsr| < 8 km s⁻¹), and the blue/red contours trace the high-velocity jet (V − V_lsr > 50 km s⁻¹, powered by component A of the Cep E protostellar core. The data are from Lefloch et al. (2015) and de A. Schutzer et al. (2022). Right: SiO J= 5–4 emissions detected in the Cep E protostellar core with the IRAM interferometer at 1.4″ (1150 au) resolution in the jets powered by protostars A (red and white contours) and B (blue and red contours). The velocity intervals of integrated flux are reported (in km s⁻¹) next to the lobes of the jets from A and B. The first contour and contour interval are 10% and 20% of the maximum peak intensity. The data are from Ospina-Zamudio et al. (2018).