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Fig. 1

image

ZIMPOL observations of W Hya in filters NR, cnt748, and cnt820. Top panels: total intensity of W Hya normalised to the peak total intensity value in the image. Middle panels: images of the PSF-reference star HD 123906 normalised to the peak polarised intensity. Bottom panels: images of the polarised intensity of W Hya normalised to the peak polarised intensity value in the image. The dashed circles indicate the radius of 18 mas measured by Woodruff et al. (2009) in the near-infrared.

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