Velocity (moment 1) maps of o - H2CO21,1−21,2 in the W51e2 region using a) the naturally weighted map and b) the Briggs w = 0.5 weighted map. The X’s mark Shi et al. (2010b) cores. The contours show the moment 0 maps integrated from 50 to 63 km s-1 at [–0.4, –0.3, –0.2, –0.1, 0.010, 0.020, 0.030, 0.040] Jy km s-1 (natural) and [–0.28, –0.21, –0.14, –0.07, 0.007, 0.0105, 0.014] Jy km s-1 (Briggs).
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