Continuum image toward L1527 at 1.3 mm (first panel) and integrated intensity maps for the ¹³CO J = 2–1 (second panel), C¹⁸O J = 2–1 (third panel)and N₂D⁺ J = 3–2 (fourth panel) transitions. For ¹³CO and C¹⁸O, only channels with a >3σ detection are included. The red and black contours indicate the 3σ level of the red- and blueshifted emission, which corresponds to 18 and 21 mJy beam⁻¹ km s⁻¹ for ¹³CO, and 17 and 18 mJy beam⁻¹ km s⁻¹ for C¹⁸ O. The white contours denote the 5σ and 50σ levels (1σ = 0.13 mJy beam⁻¹) for the continuum, and the 3σ (20 mJy beam⁻¹ km s⁻¹) level for N₂D⁺. The positionof the continuum peak (α(J2000) = 04^h39^m53. s88; δ(J2000) = 26°03′09. ′′57) is marked by a black cross and the blue and red arrows show the direction of the outflow. The beam is shown in the lower left corner of each panel. The right panel shows a schematic view of the disk and inner envelope. The midplane is indicated bya dotted line.