2014MNRAS.445.1761Y

We present the analysis of early published by Yudin & Evans polarimetric data for TeV γ-ray binary HESS J0632+057 (HD 259440, MWC 148). It was found out that some fraction of the observed polarization (about 2 per cent) may have an intrinsic (stellar/circumstellar) origin. We supposed that a global net polarization of a few per cent can be produced by the circumstellar disc which may be oriented at the angle of either 165° or 75° in the plane of the sky. Investigation of long-term polarimetric changes (at different epochs) shows that the object exhibits significant variability ( ∼ 0.7 per cent) in the blue spectral region (photometric band U). Short-term polarimetric variability (hours) may also occur but more precise measurements are needed to make definite conclusions.