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 Title: 

            Subaru Coronagraphic Imaging of Young Intermediate-mass Stars

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 Authors:

          Misato Fukagawa, Univ. of Tokyo

          Motohide Tamura, NAOJ

          Yoichi Itoh, Kobe Univ.

          Yumiko Oasa, Kobe Univ.

          Saeko Hayashi, Subaru Telescope

          Masahiko Hayashi, Subaru Telescope

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 Abstract:

          Direct imaging is the simplest but the powerful way to probe the spatial structure of a disk, which reflects the dynamical process of disk material possibly relevant to the planet formation.  We present the results of the near-infrared coronagraphic observations for Herbig Ae/Be stars and Vega-like stars, using Subaru/CIAO with the adaptive optics. The observations were carried out for 16 Herbig Ae/Be stars and 4 Vega-like stars, of which 5 extended disks were resolved around Herbig Ae stars including one newly found disk of HD 142527. Three disks (AB Aur, HD 142527, HD 163296) show the remarkable structure such as spiral arms or a ring. We report the  properties of those resolved disks in scattered light, and discuss the diversity of disk  structure around intermediate-mass stars, in terms of the effect of their natal star-forming environments.

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