GM Aur 过渡盘内腔的分辨近红外图像
太阳与恒星天体物理
2016-10-28 v2 地球与行星天体物理
摘要
我们展示了围绕年轻类太阳恒星 GM Aur 的过渡盘的高对比度 H 波段偏振强度（PI）图像。该盘的近红外直接成像是在 Subaru 8.2 米望远镜和 HiCIAO 上利用偏振差分成像得到的。获得的角分辨率和内工作角分别为 0."07 和 r~0."05。我们清晰地分辨出一个大内腔，测得其半径为 18+/-2 au，这小于亚毫米干涉图像的半径（28 au）。近红外和亚毫米波长下空腔半径的这一差异，可能是由距离恒星约 20 au、靠近空腔边缘的一颗 3-4M_Jup 行星造成的。近红外内腔的存在对过渡盘内腔形成的假说构成了强约束。已有研究提出尘埃过滤机制来解释亚毫米图像中的大空腔，但我们的结果表明该机制必须与一个额外过程相结合。我们发现外盘的 PI 斜率与从 HST/NICMOS 获得的强度斜率显著不同，这种差异可能表明盘内发生了颗粒生长过程。
引用
@article{arxiv.1610.03913,
title = {A Resolved Near-Infrared Image of The Inner Cavity in The GM Aur Transitional Disk},
author = {Daehyeon Oh and Jun Hashimoto and Joseph C. Carson and Markus Janson and Jungmi Kwon and Takao Nakagawa and Satoshi Mayama and Taichi Uyama and Yi Yang and Tomoyuki Kudo and Nobuhiko Kusakabe and Lyu Abe and Eiji Akiyama and Wolfgang Brandner and Timothy D. Brandt and Thayne Currie 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 Ryo Kandori and Gillian R. Knapp and Masayuki Kuzuhara 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 Naruhisa Takato and Hiroshi Terada and Christian Thalmann and Edwin L. Turner and Makoto Watanabe and Hideki Takami and Tomonori Usuda and Motohide Tamura},
journal= {arXiv preprint arXiv:1610.03913},
year = {2016}
}
备注
12 pages, 3 figures, Accepted for publication in ApJ Letters