DCO⁺ compared with continuum and C¹⁸O toward VLA1623A and B, marked with a square and triangle, respectively. The black ellipse shows the synthesized beam. Intensity integrated DCO⁺ (color-scale) with a) 1.3 mm continuum and b) C¹⁸O. DCO⁺ peaks at 0.0433 Jy beam^-1 km s^-1. Contours are in steps of 3, 5, 10, 15, 20, 40, 60 and 78σ with σ = 1 mJy beam^-1 for 1.3 mm continuum, and −5, −3, 3, 5, 10, 15, 20 and 25σ with σ = 13 mJy beam^-1 km s^-1 for C¹⁸O. Velocity map (moment 1, color-scale) for c) DCO⁺ and d) C¹⁸O overlaid with the corresponding intensity integrated map (contours). Contours are in steps of −10, −7, −4, 4, 7, 10 and 11σ with σ = 3 mJy beam^-1 km s^-1 for DCO⁺, and the same as in b) for C¹⁸O.