SEEDS自适应光学成像观测散射光下的不对称过渡盘Oph IRS 48
地球与行星天体物理
2015-06-23 v1 太阳与恒星天体物理
摘要
我们展示了过渡盘Oph IRS 48（WLY 2-48）的首批高分辨率近红外图像，该盘最近被ALMA观测到具有强烈不对称的亚毫米波流量分布。H波段偏振强度图像显示了一个半径约60AU的散射光空腔，并带有两个显著的发射弧：一个从东北延伸至东南，另一个较小、较暗且更远的弧位于西北。K波段散射光图像揭示了类似的形态，但沿盘空腔的西南边缘有一个清晰的第三弧。该弧与西北弧几乎成直角相交，揭示了盘中存在旋臂或局部表面亮度亏损，并解释了H波段数据中的东西向亮度不对称性。我们还展示了该天体0.8-5.4m的IRTF SpeX光谱，这使我们能够将其光谱类型限定为A01，并测量到 /yr 的低质量吸积率，两者均与之前的估计一致。我们研究了多种消光规律以拟合Oph IRS 48的多波段光谱能量分布，并找到了与之前估计相比更年轻、光度更高的恒星相一致的最佳拟合。
引用
@article{arxiv.1411.0671,
title = {SEEDS Adaptive Optics Imaging of the Asymmetric Transition Disk Oph IRS 48 in Scattered Light},
author = {Katherine B. Follette and Carol A. Grady and Jeremy R. Swearingen and Michael L. Sitko and Elizabeth H. Champney and Nienke van der Marel and Michihiro Takami and Marc J. Kuchner and Laird M. Close and Takayuki Muto and Satoshi Mayama and Michael W. McElwain and Misato Fukagawa and Koen Maaskant and Michiel Min and Ray W. Russell and Tomoyuki Kudo and Nobuhiko Kusakabe and Jun Hashimoto and Lyu Abe and Eiji Akiyama and Wolfgang Brandner and Timothy D. Brandt and Joseph Carson and Thayne Currie and Sebastian E. Egner and Markus Feldt and Miwa Goto and Olivier Guyon and Yutaka Hayano and Masahiko Hayashi and Saeko Hayashi and Thomas Henning and Klaus 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 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 Takahashi and Naruhisa Takato and Hiroshi Terada and Christian Thalmann and Daigo Tomono and Edwin L. Turner and Makoto Watanabe and John P. Wisniewski and Toru Yamada and Hideki Takami and Tomonori Usuda and Motohide Tamura},
journal= {arXiv preprint arXiv:1411.0671},
year = {2015}
}
备注
Accepted by ApJ. 19 pages, 15 figures