Fig. 9

Distributions of the dispersion of polarization position angles
as a functionof the polarization fraction
from star formation regions observed by Planck without filtering (left), and with filtering (right). Same as Fig. 4. Interferometric filtering degrades the quality of the
versus
correlation (smaller R2) and affects its power law index α, which flattens from 0.94 before filtering to 0.48 after filtering.
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