The JCMT BISTRO Survey: An 850/450$μ$m Polarization Study of NGC 2071IR in OrionB
Creators: name: Lyo, A-Ran
name: Kim, Jongsoo
name: Sadavoy, Sarah
name: Johnstone, Doug
name: Berry, David
name: Pattle, Kate
name: Kwon, Woojin
name: Bastien, Pierre
name: Onaka, Takashi
name: Di Francesco, James
name: Kang, Ji-Hyun
name: Furuya, Ray
name: Hull, Charles L. H.
name: Tamura, Motohide
name: Koch, Patrick M.
name: Ward-Thompson, Derek
name: Hasegawa, Tetsuo
name: Hoang, Thiem
name: Arzoumanian, Doris
name: Lee, Chang Won
name: Lee, Chin-Fei
name: Byun, Do-Young
name: Kirchschlager, Florian
name: Doi, Yasuo
name: Kim, Kee-Tae
name: Hwang, Jihye
name: Diep, Pham Ngoc
name: Fanciullo, Lapo
name: Lee, Sang-Sung
name: Park, Geumsook
name: Yoo, Hyunju
name: Chung, Eun Jung
name: Whitworth, Anthony
name: Mairs, Steve
name: Soam, Archana
name: Liu, Tie
name: Tang, Xindi
name: Coudé, Simon
name: André, Philippe
name: Bourke, Tyler L.
name: Chen, Huei-Ru Vivien
name: Chen, Zhiwei
name: Chen, Wen Ping
name: Chen, Mike
name: Ching, Tao-Chung
name: Cho, Jungyeon
name: Choi, Minho
name: Choi, Yunhee
name: Chrysostomou, Antonio
name: Dai, Sophia
name: Dowell, C. Darren
name: Duan, Hao-Yuan
name: Duan, Yan
name: Eden, David
name: Eswaraiah, Chakali
name: Eyres, Stewart
name: Fiege, Jason
name: Fisse, 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: Hatchell, Jannifer
name: Hayashi, Saeko
name: Houde, Martin
name: Inoue, Tsuyoshi
name: Inutsuka, Shu-ichiro
name: Iwasaki, Kazunari
name: Jeong, Il-Gyo
name: Kang, Miju
name: Kataoka, Akimasa
name: Kawabata, Koji
name: Kemper, Francisca
name: Kim, Gwanjeong
name: Kim, Mi-Ryang
name: Kim, Shinyoung
name: Kim, Kyoung Hee
name: Kirk, Jason
name: Kobayashi, Masato I. N.
name: Könyves, Vera
name: Kusune, Takayoshi
name: Kwon, Jungmi
name: Lacaille, Kevin
name: Lai, Shih-Ping
name: Law, Chi-Yan
name: Lee, Jeong-Eun
name: Lee, Yong-Hee
name: Lee, Hyeseung
name: Li, Dalei
name: Li, Di
name: Li, Hua-Bai
name: Liu, Hong-Li
name: Liu, Junhao
name: Liu, Sheng-Yuan
name: Lu, Xing
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: Parsons, Harriet
name: Peretto, Nicolas
name: Priestley, Felix
name: Pyo, Tae-soo
name: Qian, Lei
name: Qiu, Keping
name: Rao, Ramprasad
name: Rawlings, Jonathan
name: Rawlings, Mark G.
name: Retter, Brendan
name: Richer, John
name: Rigby, Andrew
name: Saito, Hiro
name: Savini, Giorgio
name: Scaife, Anna
name: Seta, Masumichi
name: Shimajiri, Yoshito
name: Shinnaga, Hiroko
name: Tahani, Mehrnoosh
name: Tang, Ya-Wen
name: Tomisaka, Kohji
name: Tram, Le Ngoc
name: Tsukamoto, Yusuke
name: Viti, Serena
name: Wang, Jia-Wei
name: Wang, Hongchi
name: Xie, Jinjin
name: Yen, Hsi-Wei
name: Yuan, Jinghua
name: Yun, Hyeong-Sik
name: Zenko, Tetsuya
name: Zhang, Guoyin
name: Zhang, Chuan-Peng
name: Zhang, Yapeng
name: Zhou, Jianjun
name: Zhu, Lei
name: de Looze, Ilse
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We present the results of simultaneous 450 $μ$m and 850 $μ$m polarization observations toward the massive star forming region NGC 2071IR, a target of the BISTRO (B-fields in Star-Forming Region Observations) Survey, using the POL-2 polarimeter and SCUBA-2 camera mounted on the James Clerk Maxwell Telescope. We find a pinched magnetic field morphology in the central dense core region, which could be due to a rotating toroidal disk-like structure and a bipolar outflow originating from the central young stellar object, IRS 3. Using the modified Davis-Chandrasekhar-Fermi method, we obtain a plane-of-sky magnetic field strength of 563$\pm$421 $μ$G in the central $\sim$0.12 pc region from 850 $μ$m polarization data. The corresponding magnetic energy density of 2.04$\times$10$^{-8}$ erg cm$^{-3}$ is comparable to the turbulent and gravitational energy densities in the region. We find that the magnetic field direction is very well aligned with the whole of the IRS 3 bipolar outflow structure. We find that the median value of polarization fractions, 3.0 \%, at 450 $μ$m in the central 3 arcminute region, which is larger than the median value of 1.2 \% at 850 $μ$m. The trend could be due to the better alignment of warmer dust in the strong radiation environment. We also find that polarization fractions decrease with intensity at both wavelengths, with slopes, determined by fitting a Rician noise model, of $0.59 \pm 0.03$ at 450 $μ$m and $0.36 \pm 0.04$ at 850 $μ$m, respectively. We think that the shallow slope at 850 $μ$m is due to grain alignment at the center being assisted by strong radiation from the central young stellar objects.
description: 17 pages, 11 figures, 4 tables