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Fig. 1

image

Spatial distribution of H2D+ line emission as observed with JCMT toward the cores L1521f, L183, L1517B, L694-2, and L1544. The red cross indicates the peak of the 850 μm emission. 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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