The JCMT BISTRO-2 Survey: Magnetic Fields of the Massive DR21 Filament
Creators: name: Ching, Tao-Chung
name: Qiu, Keping
name: Li, Di
name: Ren, Zhiyuan
name: Lai, Shih-Ping
name: Berry, David
name: Pattle, Kate
name: Furuya, Ray
name: Ward-Thompson, Derek
name: Johnstone, Doug
name: Koch, Patrick M.
name: Lee, Chang Won
name: Hoang, Thiem
name: Hasegawa, Tetsuo
name: Kwon, Woojin
name: Bastien, Pierre
name: Eswaraiah, Chakali
name: Wang, Jia-Wei
name: Kim, Kyoung Hee
name: Hwang, Jihye
name: Soam, Archana
name: Lyo, A-Ran
name: Liu, Junhao
name: Gouellec, Valentin J. M. Le
name: Arzoumanian, Doris
name: Whitworth, Anthony
name: Di Francesco, James
name: Poidevin, Frederick
name: Liu, Tie
name: Coude, Simon
name: Tahani, Mehrnoosh
name: Liu, Hong-Li
name: Onaka, Takashi
name: Li, Dalei
name: Tamura, Motohide
name: Chen, Zhiwei
name: Tang, Xindi
name: Kirchschlager, Florian
name: Bourke, Tyler L.
name: Byun, Do-Young
name: Chen, Mike
name: Chen, Huei-Ru Vivien
name: Chen, Wen Ping
name: Cho, Jungyeon
name: Choi, Yunhee
name: Choi, Youngwoo
name: Choi, Minho
name: Chrysostomou, Antonio
name: Chung, Eun Jung
name: Dai, Y. Sophia
name: Diep, Pham Ngoc
name: Doi, Yasuo
name: Duan, Yan
name: Duan, Hao-Yuan
name: Eden, David
name: Fanciullo, Lapo
name: Fiege, Jason
name: Fissel, Laura M.
name: Franzmann, Erica
name: Friberg, Per
name: Friesen, Rachel
name: Fuller, Gary
name: Gledhill, Tim
name: Graves, Sarah
name: Greaves, Jane
name: Griffin, Matt
name: Gu, Qilao
name: Han, Ilseung
name: Hayashi, Saeko
name: Houde, Martin
name: Hull, Charles L. H.
name: Inoue, Tsuyoshi
name: Inutsuka, Shu-ichiro
name: Iwasaki, Kazunari
name: Jeong, Il-Gyo
name: Konyves, Vera
name: Kang, Ji-hyun
name: Kang, Miju
name: Karoly, Janik
name: Kataoka, Akimasa
name: Kawabata, Koji
name: Kemper, Francisca
name: Kim, Jongsoo
name: Kim, Mi-Ryang
name: Kim, Shinyoung
name: Kim, Hyosung
name: Kim, Kee-Tae
name: Kim, Gwanjeong
name: Kirk, Jason
name: Kobayashi, Masato I. N.
name: Kusune, Takayoshi
name: Kwon, Jungmi
name: Lacaille, Kevin
name: Law, Chi-Yan
name: Lee, Sang-Sung
name: Lee, Hyeseung
name: Lee, Jeong-Eun
name: Lee, Chin-Fei
name: Lee, Yong-Hee
name: Li, Guangxing
name: Li, Hua-bai
name: Lin, Sheng-Jun
name: Liu, Sheng-Yuan
name: Lu, Xing
name: Mairs, Steve
name: Matsumura, Masafumi
name: Matthews, Brenda
name: Moriarty-Schieven, Gerald
name: Nagata, Tetsuya
name: Nakamura, Fumitaka
name: Nakanishi, Hiroyuki
name: Ngoc, Nguyen Bich
name: Ohashi, Nagayoshi
name: Park, Geumsook
name: Parsons, Harriet
name: Peretto, Nicolas
name: Priestley, Felix
name: Pyo, Tae-Soo
name: Qian, Lei
name: Rao, Ramprasad
name: Rawlings, Mark
name: Rawlings, Jonathan
name: Retter, Brendan
name: Richer, John
name: Rigby, Andrew
name: Sadavoy, Sarah
name: Saito, Hiro
name: Savini, Giorgio
name: Seta, Masumichi
name: Shimajiri, Yoshito
name: Shinnaga, Hiroko
name: Tang, Ya-Wen
name: Tomisaka, Kohji
name: Tram, Le Ngoc
name: Tsukamoto, Yusuke
name: Viti, Serena
name: Wang, Hongchi
name: Wu, Jintai
name: Xie, Jinjin
name: Yang, Meng-Zhe
name: Yen, Hsi-Wei
name: Yoo, Hyunju
name: Yuan, Jinghua
name: Yun, Hyeong-Sik
name: Zenko, Tetsuya
name: Zhang, Chuan-Peng
name: Zhang, Yapeng
name: Zhang, Guoyin
name: Zhou, Jianjun
name: Zhu, Lei
name: de Looze, Ilse
name: Andre, Philippe
name: Dowell, C. Darren
name: Eyres, Stewart
name: Falle, Sam
name: Robitaille, Jean-Francois
name: van Loo, Sven
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We present 850 $μ$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.
description: 26 pages, 13 figures, ApJ accepted