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Fig. 10


Line profiles of C2H (N = 43, J = 9/27/2, F = 43) toward IRAS 4A, IRAS 4B, and IRAS 4C (bottom to top). C2H is stronger toward IRAS 4C. The intensity of the other two lines are comparable, but IRAS 4A shows a broader profile. The vertical line represents the ambient velocity of IRAS 4A and 4B at +6.7 km s-1.

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