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Fig. 2

image

Spatial distribution of N2H+ 4–3 as observed with JCMT toward L1544 and L1521f. These two are the only cores with N2H+ 4–3 line emission detections. The area filled with light green indicates the clear (>3σ) detections and the possible detections (~2σ) based on the line shape and peak velocity position.

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