Magnetic field geometry of the large globule CB 34
  We report the results of optical polarimetric observations of a Bok globule
CB34 to study magnetic field structure on large scales ($10^5-10^6$ AU), which
is combined with archival sub-mm observations to characterize the magnetic
field structure of CB34 on small scales ($10^4 - 10^5$ AU). The optical
polarization measurements indicate that the magnetic field in the globule is
constrained to a maximum radius of $10^5$AU around the core, out to densities
not smaller than $10^4$cm$^{-3}$. Our study is mainly concentrated on two
submillimeter cores C1 and C2 of CB34. The direction of magnetic field of core
C2 is found to be nearly perpendicular to the CO outflow direction of the
globule. The magnetic field of core C1 is almost aligned with the minor axis of
the core which is typical for magnetically dominated star formation models. The
mean value of offset between the minor axis of core C2 and the outflow
direction is found to be $14^\circ$ which suggests that the direction of the
outflow is almost aligned with the minor axis of core C2. The magnetic field
strength in the plane-of-sky for cores C1 and C2 is estimated to be $\approx
34\mu$G and $\approx 70\mu$G.
