Magnetic fields, polarized intensity, and molecular line observations around the NC1333 IRAS4A Class 0 protostellar core (as in Figure 3). The thick light blue contours (top right and bottom panels) trace the moment 0 map of the CS (by integrating emission from -10 to 19.5 km s⁻¹) molecular emission spectral line. The two crosses are located at the two peaks of the dust continuum map. IRAS4A1 is to the southeast of IRAS4A2. The ALMA 1.3mm dust polarized emission is from Ko et al. (2020). The CS emission line is from Chuang et al. (2021).