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20 April 2024

» arxiv » 2212.01981

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The JCMT BISTRO-2 Survey: Magnetic Fields of the Massive DR21 Filament
Tao-Chung Ching ; Keping Qiu ; Di Li ; Zhiyuan Ren ; Shih-Ping Lai ; David Berry ; Kate Pattle ; Ray Furuya ; Derek 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 ; Doris Arzoumanian ; Anthony Whitworth ; James Di Francesco ; Frederick Poidevin ; Tie Liu ; Simon Coude ; Mehrnoosh Tahani ; Hong-Li 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 ; Youngwoo Choi ; Minho Choi ; Antonio 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 ; Gary Fuller ; Tim Gledhill ; Sarah Graves ; Jane Greaves ; Matt Griffin ; Qilao Gu ; Ilseung Han ; Saeko Hayashi ; Martin Houde ; Charles L. H. Hull ; Tsuyoshi Inoue ; Shu-ichiro Inutsuka ; Kazunari Iwasaki ; Il-Gyo Jeong ; Vera Konyves ; Ji-hyun Kang ; Miju Kang ; Janik Karoly ; Akimasa Kataoka ; Koji Kawabata ; Francisca Kemper ; Jongsoo Kim ; Mi-Ryang Kim ; Shinyoung Kim ; Hyosung Kim ; Kee-Tae Kim ; Gwanjeong Kim ; Jason 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 ; Guangxing Li ; Hua-bai Li ; Sheng-Jun Lin ; Sheng-Yuan Liu ; Xing Lu ; Steve Mairs ; Masafumi Matsumura ; Brenda Matthews ; Gerald Moriarty-Schieven ; Tetsuya Nagata ; Fumitaka Nakamura ; Hiroyuki Nakanishi ; Nguyen Bich Ngoc ; Nagayoshi Ohashi ; Geumsook Park ; Harriet Parsons ; Nicolas Peretto ; Felix Priestley ; Tae-Soo Pyo ; Lei Qian ; Ramprasad Rao ; Mark Rawlings ; Jonathan Rawlings ; Brendan Retter ; John Richer ; Andrew Rigby ; Sarah Sadavoy ; Hiro Saito ; Giorgio Savini ; Masumichi Seta ; Yoshito Shimajiri ; Hiroko Shinnaga ; Ya-Wen Tang ; Kohji Tomisaka ; Le Ngoc Tram ; Yusuke Tsukamoto ; Serena 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 ; Ilse de Looze ; Philippe Andre ; C. Darren Dowell ; Stewart Eyres ; Sam Falle ; Jean-Francois Robitaille ; Sven van Loo ;
Date:	5 Dec 2022
Abstract:	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.
Source:	arXiv, 2212.01981
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