过渡星周盘 RX J1615.3-3255 中大小尘埃颗粒的径向解耦
太阳与恒星天体物理
2017-01-18 v1
摘要
我们展示了位于约 1 Myr 老的豺狼座星协中的过渡星周盘 RX J1615.3-3255 的 H 波段（1.6 {\mu}m）散射光观测结果。从利用 Subaru 望远镜的 HiCIAO 仪器拍摄的偏振强度图像中，我们推导出了该星周盘的位置角和倾角。发现该星周盘在散射光中延伸至 68 12 AU，且未观察到清晰的结构。我们 24 AU 的内工作角不允许我们探测到类似于在 880 {\mu}m 连续谱观测中于 30 AU 处看到的中心强度下降。我们将观测结果与基于光谱能量分布（SED）和亚毫米干涉测量的多个星周盘模型进行比较，发现位于 30 AU 处包含小硅酸盐颗粒的外盘内边缘产生的偏振强度信号比观测值大一个数量级。我们表明，小尘埃颗粒平滑延伸至大颗粒所在空腔的模型更接近实际的 H 波段观测结果。对不同尘埃粒径分布模型的比较表明，与星际介质相比，该星周盘中的尘埃可能经历了显著的演化处理。
引用
@article{arxiv.1610.00908,
title = {Radial decoupling of small and large dust grains in the transitional disk RX J1615.3-3255},
author = {Robin Kooistra and Inga Kamp and Misato Fukagawa and Francois Ménard and Munetake Momose and Takashi Tsukagoshi and Tomoyuki Kudo and Nobuhiko Kusakabe and Jun Hashimoto and Lyu Abe and Wolfgang Brandner and Timothy D. Brandt and Joseph C. Carson and Sebastian E. Egner and Markus Feldt and Miwa Goto and Carol A. Grady and Olivier Guyon and Yutaka Hayano and Masahiko Hayashi and Saeko S. Hayashi and Thomas Henning and Klaus W. Hodapp and Miki Ishii and Masanori Iye and Markus Janson and Ryo Kandori and Gillian R. Knapp and Masayuki Kuzuhara and Jungmi Kwon and Taro Matsuo and Michael W. McElwain and Shoken Miyama and Jun-Ichi Morino and Amaya Moro-Martin and Tetsuo Nishimura and Tae-Soo Pyo and Eugene Serabyn and Takuya Suenaga and Hiroshi Suto and Ryuji Suzuki and Yasuhiro H. Takahashi and Michihiro Takami and Naruhisa Takato and Hiroshi Terada and Christian Thalmann and Daigo Tomono and Edwin L. Turner and Makoto Watanabe and John Wisniewski and Toru Yamada and Hideki Takami and Tomonori Usuda and Motohide Tamura and Thayne Currie and Eiji Akiyama and Satoshi Mayama and Katherine B. Follette and Takao Nakagawa},
journal= {arXiv preprint arXiv:1610.00908},
year = {2017}
}
备注
8 pages, 7 figures, 4 tables. Accepted for publication in A&A