Large Infrared Circular Polarization of Grw+70°8247

Abstract

The percentage of circular polarization in light from the magnetic white dwarf Grw+ has been measured in a broad passband 0.9-1.6 , with estimated mean wavelengths of 1.15 and 1.25 M, respectively, for two separate observations. Values 8.5 and 15 percent, respectively, were found, with the same polarization handedness as in previous measurements in the visible region.