BISTRO 对 $\rho$ Oph-A 核的首次观测
星系天体物理
2018-05-23 v1
摘要
作为我们正在进行的巡天项目 BISTRO（星形成区磁场，B-fields In STar forming RegiOns）的一部分，我们呈现了使用亚毫米波通用用户波束阵列-2 (SCUBA-2) 及其偏振计 (POL-2) 对 Oph-A 核拍摄的 850 m 成像偏振数据。偏振矢量用于以 0.01 pc 分辨率识别投影在天面上的磁场方向。我们在 0.2 pc 的 Oph A 核中识别出 10 个具有 distinct 偏振分数与角度的子区域；其中一些可属于 Oph 区中一个相干的磁场结构。结果与先前对 Oph-A 最亮区域的观测一致，其偏振度处于百分之几的水平，但我们的数据首次揭示了核周围较暗区域的磁场结构，那里偏振度要高得多（). 与先前近红外偏振数据的比较显示，存在若干在近红外与亚毫米波长上一致的磁场分量。利用 Davis-Chandrasekhar-Fermi 方法，我们还推导了若干子核区域的磁场强度，范围约为 0.2 至 5 mG。我们还发现投影在天面上的磁场方向与核质心速度分量之间存在相关性。
引用
@article{arxiv.1804.09313,
title = {A First Look at BISTRO Observations of The $\rho$ Oph-A core},
author = {Jungmi Kwon and Yasuo Doi and Motohide Tamura and Masafumi Matsumura and Kate Pattle and David Berry and Sarah Sadavoy and Brenda C. Matthews and Derek Ward-Thompson and Tetsuo Hasegawa and Ray S. Furuya and Andy Pon and James Di Francesco and Doris Arzoumanian and Saeko S. Hayashi and Koji S. Kawabata and Takashi Onaka and Minho Choi and Miju Kang and Thiem Hoang and Chang Won Lee and Sang-Sung Lee and Hong-Li Liu and Tie Liu and Shu-Ichiro Inutsuka and Chakali Eswaraiah and Pierre Bastien and Woojin Kwon and Shih-Ping Lai and Keping Qiu and Simon Coude and Erica Franzmann and Per Friberg and Sarah F. Graves and Jane S. Greaves and Martin Houde and Doug Johnstone and Jason M. Kirk and Patrick M. Koch and Di Li and Harriet Parsons and Ramprasad Rao and Mark Rawlings and Hiroko Shinnaga and Sven Van Loo and Yusuke Aso and Do-Young Byun and Huei-Ru Chen and Mike C. -Y. Chen and Wen Ping Chen and Tao-Chung Ching and Jungyeon Cho and Antonio Chrysostomou and Eun Jung Chung and Emily Drabek-Maunder and Stewart P. S. Eyres and Jason Fiege and Rachel K. Friesen and Gary Fuller and Tim Gledhill and Matt J. Griffin and Qilao Gu and Jennifer Hatchell and Wayne Holland and Tsuyoshi Inoue and Kazunari Iwasaki and Il-Gyo Jeong and Ji-Hyun Kang and Sung-Ju Kang and Francisca Kemper and Gwanjeong Kim and Jongsoo Kim and Kee-Tae Kim and Kyoung Hee Kim and Mi-Ryang Kim and Shinyoung Kim and Kevin M. Lacaille and Jeong-Eun Lee and Dalei Li and Hua-Bai Li and Junhao Liu and Sheng-Yuan Liu and A-Ran Lyo and Steve Mairs and Gerald H. Moriarty-Schieven and Fumitaka Nakamura and Hiroyuki Nakanishi and Nagayoshi Ohashi and Nicolas Peretto and Tae-Soo Pyo and Lei Qian and Brendan Retter and John Richer and Andrew Rigby and Jean-Franois Robitaille and Giorgio Savini and Anna M. M. Scaife and Archana Soam and Ya-Wen Tang and Kohji Tomisaka and Hongchi Wang and Jia-Wei Wang and Anthony P. Whitworth and Hsi-Wei Yen and Hyunju Yoo and Jinghua Yuan and Chuan-Peng Zhang and Guoyin Zhang and Jianjun Zhou and Lei Zhu and Philippe Andre and C. Darren Dowell and Sam Falle and Yusuke Tsukamoto and Takao Nakagawa and Yoshihiro Kanamori and Akimasa Kataoka and Masato I. N. Kobayashi and Tetsuya Nagata and Hiro Saito and Masumichi Seta and Tetsuya Zenko},
journal= {arXiv preprint arXiv:1804.09313},
year = {2018}
}
备注
22 pages, 11 figures, accepted for publication in ApJ