Bok globule CB17: Polarization, extinction and distance
  In this paper, the results obtained from the polarimetric study of a Bok
globule CB17 in both optical and sub-millimeter wavelength are presented. The
optical polarimetric observations in R-band ($\lambda$ = 630 nm, $\Delta
\lambda$ = 120 nm) were conducted from 1.04-meter Sampurnanand Telescope,
ARIES, Nainital, India on 9th March 2016, while, the sub-mm polarimetric data
are taken from the SCUPOL data archive which has been reanalyzed. The contours
of Herschel\footnote{Herschel is an ESA space observatory with science
instruments provided by European-led Principal Investigator consortia and with
important participation from NASA.} SPIRE 500$\mu m$ dust continuum emissions
of CB17 (typically a cometary-shaped globule) are overlaid on the DSS image of
CB17 along with polarization vectors (optical and submm). The magnetic field
strength at the core of the globule is estimated to be $99\mu$G. Using the
Near-Infrared photometric technique and \emph{Gaia} data, the distance to CB17
is found to be $253 \pm 43$ parsec. A correlation between the various
quantities of the globule is also studied. It is observed that the magnetic
field in the cloud core as revealed by polarization measurements at the
sub-millimeter dust emission is found to be almost aligned along the minor axis
of the globule which fits the magnetically regulated star formation model. The
misalignment between core-scale magnetic field direction and molecular outflow
direction is also found.
