ИСТИНА

Results of UBVRIJHKLM photometry and VRI polarimetry of a young star RW Aur A observed during 2010-11 and 2014-18 dimming events are presented. Polarization degree p of RWAur A at this period has reached 30 % in I band. As in the case of UXORs so called 'blueing effect' in the color-magnitude V vs. B-V, V-R, V-I diagrams of the star and strong anticorrelation between p and brightness were observed. But duration and amplitude of the eclipses as well as value and orientation of polarization vector in our case differ significantly from that of UXORs. We concluded that dimmings of RW Aur A occured due to eclipses of the star and inner regions of its disk by axisymmetric dust evelope created by disk wind. Taking into account both scattering and absorption of stellar light by the evelope we explain the main features of the lightcurve and polarization degree - magnitude dependence as well as estimate parameters of the dusty wind: mass loss rate, transverse component of the wind velocity, gas particle density.