The JCMT BISTRO Survey: Magnetic Fields Associated with a Network of Filaments in NGC 1333
Authors: Doi Yasuo , Hasegawa Tetsuo , Furuya Ray S. , Coudé Simon , Hull Charles L. H. , Arzoumanian Doris , Bastien Pierre , Chen Michael Chun-Yuan , Di Francesco James , Friesen Rachel , Houde Martin , Inutsuka Shu-ichiro , Mairs Steve , Matsumura Masafumi , Onaka Takashi , Sadavoy Sarah , Shimajiri Yoshito , Tahani Mehrnoosh , Tomisaka Kohji , Eswaraiah Chakali , Koch Patrick M. , Pattle Kate , Won Lee Chang , Tamura Motohide , Berry David , Ching Tao-Chung , Hwang Jihye , Kwon Woojin , Soam Archana , Wang Jia-Wei , Lai Shih-Ping , Qiu Keping , Ward-Thompson Derek , Byun Do-Young , Chen Huei-Ru Vivien , Chen Wen Ping , Chen Zhiwei , Cho Jungyeon , Choi Minho , Choi Yunhee , Chrysostomou Antonio , Chung Eun Jung , Diep Pham Ngoc , Duan Hao-Yuan , Fanciullo Lapo , Fiege Jason , Franzmann Erica , Friberg Per , Fuller Gary , Gledhill Tim , Graves Sarah F. , Greaves Jane S. , Griffin Matt J. , Gu Qilao , Han Ilseung , Hatchell Jennifer , Hayashi Saeko S. , Hoang Thiem , Inoue Tsuyoshi , Iwasaki Kazunari , Jeong Il-Gyo , Johnstone Doug , Kanamori Yoshihiro , Kang Ji-hyun , Kang Miju , Kang Sung-ju , Kataoka Akimasa , Kawabata Koji S. , Kemper Francisca , Kim Gwanjeong , Kim Jongsoo , Kim Kee-Tae , Kim Kyoung Hee , Kim Mi-Ryang , Kim Shinyoung , Kirk Jason M. , Kobayashi Masato I. N. , Konyves Vera , Kusune Takayoshi , Kwon Jungmi , Lacaille Kevin , Law Chi-Yan , Lee Chin-Fei , Lee Hyeseung , Lee Jeong-Eun , Lee Sang-Sung , Lee Yong-Hee , Li Dalei , Li Di , Li Hua-bai , Liu Hong-Li , Liu Junhao , Liu Sheng-Yuan , Liu Tie , de Looze Ilse , Lyo A-Ran , Matthews Brenda C. , Moriarty-Schieven Gerald H. , Nagata Tetsuya , Nakamura Fumitaka , Nakanishi Hiroyuki , Ohashi Nagayoshi , Park Geumsook , Parsons Harriet , Peretto Nicolas , Pyo Tae-Soo , Qian Lei , Rao Ramprasad , Rawlings Mark G. , Retter Brendan , Richer John , Rigby Andrew , Saito Hiro , Savini Giorgio , Scaife Anna M. M. , Seta Masumichi , Shinnaga Hiroko , Tang Ya-Wen , Tsukamoto Yusuke , Viti Serena , Wang Hongchi , Whitworth Anthony P. , Yen Hsi-Wei , Yoo Hyunju , Yuan Jinghua , Yun Hyeong-Sik , Zenko Tetsuya , Zhang Chuan-Peng , Zhang Guoyin , Zhang Yapeng , Zhou Jianjun , Zhu Lei , André Philippe , Dowell C. Darren , Eyres Stewart P. S. , Falle Sam , van Loo Sven , Robitaille Jean-François 
Published: August 2020

Abstract
We present new observations of the active star formation region NGC 1333 in the Perseus molecular cloud complex from the James Clerk Maxwell Telescope B-Fields In Star-forming Region Observations (BISTRO) survey with the POL-2 instrument. The BISTRO data cover the entire NGC 1333 complex (∼1.5 pc × 2 pc) at 0.02 pc resolution and spatially resolve the polarized emission from individual filamentary structures for the first time. The inferred magnetic field structure is complex as a whole, with each individual filament aligned at different position angles relative to the local field orientation. We combine the BISTRO data with low- and high- resolution data derived from Planck and interferometers to study the multiscale magnetic field structure in this region. The magnetic field morphology drastically changes below a scale of ∼1 pc and remains continuous from the scales of filaments (∼0.1 pc) to that of protostellar envelopes (∼0.005 pc or ∼1000 au). Finally, we construct simple models in which we assume that the magnetic field is always perpendicular to the long axis of the filaments. We demonstrate that the observed variation of the relative orientation between the filament axes and the magnetic field angles are well reproduced by this model, taking into account the projection effects of the magnetic field and filaments relative to the plane of the sky. These projection effects may explain the apparent complexity of the magnetic field structure observed at the resolution of BISTRO data toward the filament network.