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Fig. 4


Integrated intensity map (core; from +5 to +9 km s-1) of CO 32 in colors, overplotted with the red wing (from +10 to +25 km s-1) emission (red contours) and blue wing (from 10 to +4 km s-1) emission in blue contours. The plot clearly shows the strong bipolar outflow driven by the IRAS 4A Class 0 object. The red and blue contours levels are set to 100, 300, 500, and 800 × rms (rms: 0.02 K).

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