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Takami, M. Tamura, M. Watanabe, M. W. McElwain, N. Kusakabe, N. Ohashi, N. Takato, O. Guyon, Ranjan Gupta, R. Dong, R. Kandori, R. Russell, R. Suzuki, Ryoko Tanii, S. Egner, S. -I. Inutsuka, S. Mayama, S. Miyama, S. S. Hayashi, T. Brandt, T. Currie, T. Fukue, T. Henning, T. Matsuo, T. Muto, T. Nishimura, Tomonori Hioki, Tomoyuki Kudo, T. -S. Pyo, T. Takeuchi, T. Usuda, T. Yamada, W. Brandner, Y. Hayano, Yoichi Itoh, Y. Okamoto, Yumiko Oasa","submitted_at":"2012-06-06T13:18:03Z","abstract_excerpt":"We present H-band polarimetric imagery of UX Tau A taken with HiCIAO/AO188 on the Subaru Telescope. UX Tau A has been classified as a pre-transitional disk object, with a gap structure separating its inner and outer disks. Our imagery taken with the 0.15 (21 AU) radius coronagraphic mask has revealed a strongly polarized circumstellar disk surrounding UX Tau A which extends to 120 AU, at a spatial resolution of 0.1 (14 AU). It is inclined by 46 \\pm 2 degree as the west side is nearest. 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