DETECTION OF WATER ICE GRAINS ON THE SURFACE OF THE CIRCUMSTELLAR DISK AROUND HD 142527
DETECTION OF WATER ICE GRAINS ON THE SURFACE OF THE CIRCUMSTELLAR DISK AROUND HD 142527
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DOI：
10.1088/0004-637x/690/2/l110
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发表时间：
2009-01
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影响因子：
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通讯作者：
M. Honda;A. Inoue;M. Fukagawa;A. Oka;T. Nakamoto;M. Ishii;H. Terada;N. Takato;H. Kawakita;Y. Okamoto;H. Shibai;M. Tamura;T. Kudo;Y. Itoh
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文献类型：
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作者：
M. Honda;A. Inoue;M. Fukagawa;A. Oka;T. Nakamoto;M. Ishii;H. Terada;N. Takato;H. Kawakita;Y. Okamoto;H. Shibai;M. Tamura;T. Kudo;Y. Itoh
Herbig Ae 星 HD 142527 的日冕成像是使用 8.2 m Subaru 望远镜上的自适应光学日冕成像仪 (CIAO) 进行的。这些图像是使用自适应光学器件 (AO) 在 H2O 冰过滤器 (λ = 3.08 μm) 中获得的，以及在没有 AO 的情况下在 L' 波段获得的。将这些数据与之前在H和K波段的观测结果相结合，我们得出了HD 142527周围星周盘的散射光光谱，并在光谱中检测到了H2O冰吸收特征。根据 Inoue 等人的预测模型，这一结果可以通过尺寸约为 1 μm 的硅酸盐和 H2O 冰粒的存在来解释。该晶粒尺寸与 Fukakawa 等人之前的观察研究一致。和藤原等人。目前的结果表明，冰带中圆盘散射光的高分辨率成像对于探测星周圆盘中 H2O 冰粒的分布非常有用。
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 H2O ice grain distributions in circumstellar disks.