V1247 Ori 星盘中的极端不对称性
太阳与恒星天体物理
2016-05-25 v1 地球与行星天体物理
摘要
我们展示了利用昴星团望远镜/HiCIAO的高分辨率偏振差分成像观测得到的 V1247 Ori 周围过渡盘的首个近红外散射光探测。我们的H波段成像揭示了距中心恒星约0.14"-0.86"（54-330 au）分离处的盘形态。偏振强度（PI）图像显示恒星东南方向有一个显著的弧状结构，而较暗的西北区域未展现出任何明显特征。臂的形状与半径0.28" ± 0.09"（距恒星108 au）的弧一致，尽管不能排除小螺距螺旋臂的可能性。V1247 Ori 在散射偏振光中呈现出异常大的方位角对比度；东南弧的径向峰值比在相同距恒星距离处测量的西北盘亮约三倍。结合先前关于 46 au间隙内密度分布不均匀的指示，外盘的显著不对称性暗示了存在未见伴星和/或正在弧中进行的行星形成过程。
引用
@article{arxiv.1605.01453,
title = {Extreme Asymmetry in the Disk of V1247 Ori},
author = {Yurina Ohta and Misato Fukagawa and Michael L. Sitko and Takayuki Muto and Stefan Kraus and Carol A. Grady and John P. Wisniewski and Jeremy R. Swearingen and Hiroshi Shibai and Takahiro Sumi and Jun Hashimoto and Tomoyuki Kudo and Nobuhiko Kusakabe and Munetake Momose and Yoshiko Okamoto and Takayuki Kotani and Michihiro Takami and Thayne Currie and Christian Thalmann and Markus Janson and Eiji Akiyama and Katherine B. Follette and Satoshi Mayama 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 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 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 Hideki Takami and Naruhisa Takato and Hiroshi Terada and Daigo Tomono and Edwin L. Turner and Tomonori Usuda and Makoto Watanabe and Toru Yamada and Motohide Tamura},
journal= {arXiv preprint arXiv:1605.01453},
year = {2016}
}
备注
21 pages, 5 figures, accepted for publication in PASJ