Integrated intensity of C¹⁸O (3–2) in the central region of B59 (gray scale and contours). The protostars are marked with star symbols, and labeled following Brooke et al. (2007). The green and blue contoured regions correspond to the regions identified from the C¹⁸O scatter plot (see text and Fig. 4 left panel), and the green and blue departures of the ¹³CO integrated emission. Though adjacent, these two regions have a temperature difference of  ~2 K, the blue region being warmer. Note that while the colder green region hosts a single protostar (B10) and a “starless” C¹⁸O peak, the warmer blue region has three embedded protostellar objects (B11, B7 and B8).