Abstract
Linear polarization measurements of stars in the region of the nearby high-latitude molecular cloud MBM 12 are presented. Stars behind the cloud show a polarization ∼ 2-3 per cent, while stars that are in front of the cloud or are projected outside the cloud boundary show very low values (≤0.5 per cent) of polarization. If the polarization is caused by dust grains aligned by a magnetic field, the observed polarization position angles suggest that the field in the cloud is more or less unidirectional and is roughly parallel to the long axis of the cloud
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