Toomre Q map obtained by assuming two disk-like structures in gravito-centrifugal rotation about the positions of peak continuum emission as depicted by the two stars, each with a mass of 10 M_⊙. The Toomre Q calculations and the positions of (proto)stars are based on the AB-array data (see Fig. 4) with regions outside the 6σ mm continuum emission masked out. Solid contours correspond to our continuum data in the most extended configuration (A-array), starting at 6σ and increasing in steps of 3σ (1σ = 2.5 mJy beam⁻¹). The solid vertical line corresponds to the stitching boundary. The dashed lines correspond to Q = 1.