HD 32297 Subaru/HICIAO polarized differential imaging (PDI) results in the H-band. a) Qφ and Uφ Stokes parameters obtained from the 2014 October 10 data in linear stretch and units of mJy/arcsec2. We recover the deviation from the midplane seen in the ADI data (see Fig. 1), but do not observe any gapped structure. The Uφ image has no clear structure apart from a very faint signal in the midplane of the disk, which is likely due to an imperfect polarimetric calibration. b) Corresponding S/N images in the linear [–5σ, 5σ] scale. The images have been convolved with a circular aperture of diameter ~FWHM. The signal in the Qφ S/N image (left panel) is not significant at small distances from the star. The noise map was obtained as the standard deviation of the Uφ image (right panel) in star-centred annuli. c) Linear polarization degree as a function of the projected distance from the star for both sides of the disk. The final polarization degree increases from ~10% at ~0.55″ to ~25% at ~1.6″, as at larger separations the scattering angles are constrained to ~90°, where the highest amount of polarization is produced.
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