Map of the cores detected in 218.9 and 230.9 GHz (1.37 mm and 1.30 mm) continuum emission observed with the SMA, in red dashed and blue solid contours, respectively. The 1.30 mm continuum emission is shown in greyscale, ranging between –2.5 and 40 mJy beam^-1. The cores are numbered as listed in Table 2. The synthesised beam is shown in the bottom left corner: 4.3′′ × 2.7′′, PA = 4.0°.