Imaging polarimetry of some selected dark clouds

Details Imaging polarimetry of some selected dark clouds Imaging polarimetry of some selected dark clouds

Jan 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26as..141..175s&link_type=abstract

Astronomy and Astrophysics Supplement, v.141, p.175-183

Astronomy and Astrophysics

Astrophysics

8

Dark Clouds, Ism: Dust, Ism: Magnetic Field-Polarization-Polarimeter, Techniques: Polarimetric

Scientific paper

A set of eight Bok Globules CB3, CB25, CB39, CB52, CB54, CB58, CB62 and CB246 were observed polarimetrically in white light, using our Imaging Polarimeter (IMPOL), from the 1.2 m IR telescope at Mount Abu, India. The observations were carried out on different nights during the period December 1997 and April 1998. The CCD images obtained from the instrument (IMPOL) were analyzed, to produce polarization map of the Bok Globules. The stars in the field, which are mostly background to the cloud show typically 2% of linear polarization. Clouds which are less dynamic (having 12CO line widths Delta V < 2.5 km s-1), in general show slightly better alignment of polarization vectors with the projected direction of galactic plane. On the other hand the more dynamic group of clouds, has the polarization vectors more scattered and poorly aligned with the projected direction of the galactic plane. However one of the clouds observed CB58 does not follow this trend very well. Tables 4 to 15 are also available at the CDS in electronic form (ftp 130.79.128.5) or http://cdsweb.u-strasbg.fr/Abstract.html Figures 1 to 11 are only available at the http://www.edpsciences.org

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