Panel a: near-IR polarization segments (red) and optical polarization segments (blue) are plotted over a 15′ × 15′ R-band DSS image of the field containing CB34. A 10% polarization segment is drawn as reference for both data sets into the lower left corner. Contours correspond to JCMT/SCUBA 850 μm dust continuum emissions from 0.1 to 0.7 Jy beam−1, with intervals of 0.1 Jy beam−1 (Das et al. 2016). Panel b: zoom into the dense centre of CB34. The near-IR polarization segments (red) and the archival sub-mm polarization segments (blue) are plotted over the total continuum intensity map at 850 (Das et al. 2016). The sub-mm segments are binned over a 10″ × 10″ grid. The solid (dashed) black (grey) contour lines correspond to blueshifted (redshifted) integrated CO emission. Contour levels are spaced at 0.1 K km s−1 intervals of 0.5 K km s−1 (black) and 0.2 K km s−1 intervals of 0.8 K km s−1 (white), respectively (from Yun & Clemens 1994; beam size of 48′′). A 5% polarization segment is drawn as reference for both data sets into the lower right corner. The well-ordered polarization pattern indicates dominant magnetic fields on scales of 103 –106 au (~ 0.005–5pc).
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