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The JCMT BISTRO-2 Survey: Magnetic Fields of the Massive DR21 Filament

2022; IOP Publishing; Volume: 941; Issue: 2 Linguagem: Inglês

10.3847/1538-4357/ac9dfb

1538-4357

Tao-Chung Ching, Keping Qiu, Di Li, Zhiyuan Ren, S. Lai, David Berry, Kate Pattle, Ray S. Furuya, D. Ward‐Thompson, Doug Johnstone, Patrick M. Koch, Chang Won Lee, Thiem Hoang, Tetsuo Hasegawa, Woojin Kwon, Pierre Bastien, Chakali Eswaraiah, Jia-Wei Wang, Kyoung Hee Kim, Jihye Hwang, Archana Soam, A-Ran Lyo, Junhao Liu, Valentin J. M. Le Gouellec, D. Arzoumanian, A. P. Whitworth, James Di Francesco, F. Poidevin, Tie Liu, Simon Coudé, Mehrnoosh Tahani, Hongli Liu, Takashi Onaka, Dalei Li, Motohide Tamura, Zhiwei Chen, Xindi Tang, Florian Kirchschlager, Tyler L. Bourke, Do‐Young Byun, Mike Chen, Huei-Ru Vivien Chen, Wen-Ping Chen, Jungyeon Cho, Yunhee Choi, Young-Woo Choi, Minho Choi, A. Chrysostomou, Eun Jung Chung, Y. Sophia Dai, Pham Ngoc Diep, Yasuo Doi, Yan Duan, Hao-Yuan Duan, David Eden, Lapo Fanciullo, Jason Fiege, Laura M. Fissel, Erica Franzmann, Per Friberg, Rachel Friesen, G. A. Fuller, T. M. Gledhill, Sarah Graves, J. S. Greaves, Matt Griffin, Qilao Gu, Ilseung Han, Saeko S. Hayashi, Martin Houde, Charles L. H. Hull, Tsuyoshi Inoue, Shu‐ichiro Inutsuka, Kazunari Iwasaki, Il-Gyo Jeong, V. Könyves, Ji‐hyun Kang, Miju Kang, Janik Karoly, Akimasa Kataoka, Koji S. Kawabata, F. Kemper, Jongsoo Kim, Mi-Ryang Kim, Shinyoung Kim, Hyosung Kim, Kee‐Tae Kim, Gwanjeong Kim, J. M. Kirk, Masato I. N. Kobayashi, Takayoshi Kusune, Jungmi Kwon, Kevin Lacaille, Chi-Yan Law, Sang-Sung Lee, Hyeseung Lee, Jeong‐Eun Lee, Chin‐Fei Lee, Yong-Hee Lee, Guang-Xing Li, Hua-bai Li, Sheng-Jun Lin, Sheng‐Yuan Liu, Xing Lu, Steve Mairs, M. Matsumura, Brenda C. Matthews, G. H. Moriarty‐Schieven, Tetsuya Nagata, Fumitaka Nakamura, Hiroyuki Nakanishi, Nguyen Bich Ngoc, Nagayoshi Ohashi, Geumsook Park, Harriet Parsons, N. Peretto, F D Priestley, Tae‐Soo Pyo, Lei Qian, Ramprasad Rao, Mark G. Rawlings, J. M. C. Rawlings, Brendan Retter, John Richer, A. J. Rigby, Sarah Sadavoy, Hiro Saito, G. Savini, Masumichi Seta, Yoshito Shimajiri, Hiroko Shinnaga, Ya‐Wen Tang, Kohji Tomisaka, Le Ngoc Tram, Yusuke Tsukamoto, S. Viti, Hongchi Wang, Jintai Wu, Jinjin Xie, Meng-Zhe Yang, Hsi-Wei Yen, Hyunju Yoo, Jinghua Yuan, Hyeong-Sik Yun, Tetsuya Zenko, Chuan-Peng Zhang, Yapeng Zhang, Guoyin Zhang, Jianjun Zhou, Lei Zhu, I. De Looze, P. André, C. D. Dowell, S. P. S. Eyres, S. A. E. G. Falle, Jean‐François Robitaille, S. Van Loo,

Astro and Planetary Science

We present 850 $\mu$m dust polarization observations of the massive DR21 filament from the B-fields In STar-forming Region Observations (BISTRO) survey, using the POL-2 polarimeter and the SCUBA-2 camera on the James Clerk Maxwell Telescope. We detect ordered magnetic fields perpendicular to the parsec-scale ridge of the DR21 main filament. In the sub-filaments, the magnetic fields are mainly parallel to the filamentary structures and smoothly connect to the magnetic fields of the main filament. We compare the POL-2 and Planck dust polarization observations to study the magnetic field structures of the DR21 filament on 0.1--10 pc scales. The magnetic fields revealed in the Planck data are well aligned with those of the POL-2 data, indicating a smooth variation of magnetic fields from large to small scales. The plane-of-sky magnetic field strengths derived from angular dispersion functions of dust polarization are 0.6--1.0 mG in the DR21 filament and $\sim$ 0.1 mG in the surrounding ambient gas. The mass-to-flux ratios are found to be magnetically supercritical in the filament and slightly subcritical to nearly critical in the ambient gas. The alignment between column density structures and magnetic fields changes from random alignment in the low-density ambient gas probed by Planck to mostly perpendicular in the high-density main filament probed by JCMT. The magnetic field structures of the DR21 filament are in agreement with MHD simulations of a strongly magnetized medium, suggesting that magnetic fields play an important role in shaping the DR21 main filament and sub-filaments.