Detection of water ice grains on the surface of the circumstellar disk around HD 142527

M. Honda*, A. K. Inoue, M. Fukagawa, A. Oka, T. Nakamoto, M. Ishii, H. Terada, N. Takato, H. Kawakita, Y. K. Okamoto, H. Shibai, M. Tamura, T. Kudo, Y. Itoh

*この研究の対応する著者

研究成果: Article査読

48 被引用数 (Scopus)

抄録

Coronagraphic imaging for the Herbig Ae star, HD 142527, was performed using the Coronagraphic Imager with Adaptive Optics (CIAO) on the 8.2 m Subaru Telescope. The images were obtained in the H2O ice filter (λ=3.08 μm) using adaptive optics (AO), and in the L' band without AO. Combining these data with previous observational results in the H and K bands, we derived the spectra of the scattered light from the circumstellar disk around HD 142527 and detected an H2O ice absorption feature in the spectra. This result can be explained by the presence of silicate and H2O ice grains of-1 μm in size, according to the prediction model by Inoue et al. This grain size is consistent with previous observational study by Fukagawa et al. and Fujiwara et al. The present result demonstrates that high-resolution imaging of disk-scattered light in the ice band is useful for detecting H 2O ice grain distributions in circumstellar disks.

本文言語English
ページ(範囲)L110-L113
ジャーナルAstrophysical Journal
690
2 PART 2
DOI
出版ステータスPublished - 2009
外部発表はい

ASJC Scopus subject areas

  • 天文学と天体物理学
  • 宇宙惑星科学

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