Revealing the diverse magnetic field morphologies in Taurus dense cores
  with sensitive sub-millimeter polarimetry
  We have obtained sensitive dust continuum polarization observations at 850
$\mu$m in the B213 region of Taurus using POL-2 on SCUBA-2 at the James Clerk
Maxwell Telescope (JCMT), as part of the BISTRO (B-fields in STar-forming
Region Observations) survey. These observations allow us to probe magnetic
field (B-field) at high spatial resolution ($\sim$2000 au or $\sim$0.01 pc at
140 pc) in two protostellar cores (K04166 and K04169) and one prestellar core
(Miz-8b) that lie within the B213 filament. Using the Davis-Chandrasekhar-Fermi
method, we estimate the B-field strengths in K04166, K04169, and Miz-8b to be
38$\pm$14 $\mu$G, 44$\pm$16 $\mu$G, and 12$\pm$5 $\mu$G, respectively. These
cores show distinct mean B-field orientations. B-field in K04166 is well
ordered and aligned parallel to the orientations of the core minor axis,
outflows, core rotation axis, and large-scale uniform B-field, in accordance
with magnetically regulated star formation via ambipolar diffusion taking place
in K04166. B-field in K04169 is found to be ordered but oriented nearly
perpendicular to the core minor axis and large-scale B-field, and not
well-correlated with other axes. In contrast, Miz-8b exhibits disordered
B-field which show no preferred alignment with the core minor axis or
large-scale field. We found that only one core, K04166, retains a memory of the
large-scale uniform B-field. The other two cores, K04169 and Miz-8b, are
decoupled from the large-scale field. Such a complex B-field configuration
could be caused by gas inflow onto the filament, even in the presence of a
substantial magnetic flux.
