JCMT BISTRO Survey: Magnetic Fields within the Hub-filament Structure in IC 5146
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1
Jia-Wei Wang
- Function : Author
Shih-Ping Lai
- Function : Author
Chakali Eswaraiah
- Function : Author
Kate Pattle
- Function : Author
James Di Francesco
- Function : Author
Doug Johnstone
- Function : Author
Patrick M. Koch
- Function : Author
Tie Liu
- Function : Author
Motohide Tamura
- Function : Author
Ray S. Furuya
- Function : Author
Takashi Onaka
- Function : Author
Derek Ward-Thompson
- Function : Author
Archana Soam
- Function : Author
Kee-Tae Kim
- Function : Author
Chang Won Lee
- Function : Author
Chin-Fei Lee
- Function : Author
Steve Mairs
- Function : Author
Doris Arzoumanian
- Function : Author
Gwanjeong Kim
- Function : Author
Thiem Hoang
- Function : Author
Jihye Hwang
- Function : Author
Sheng-Yuan Liu
- Function : Author
David Berry
- Function : Author
Pierre Bastien
- Function : Author
Tetsuo Hasegawa
- Function : Author
Woojin Kwon
- Function : Author
Keping Qiu
- Function : Author
Philippe André
- Function : Author
Yusuke Aso
- Function : Author
Do-Young Byun
- Function : Author
Huei-Ru Chen
- Function : Author
Michael C. Chen
- Function : Author
Wen Ping Chen
- Function : Author
Tao-Chung Ching
- Function : Author
Jungyeon Cho
- Function : Author
Minho Choi
- Function : Author
Antonio Chrysostomou
- Function : Author
Eun Jung Chung
- Function : Author
Simon Coudé
- Function : Author
Yasuo Doi
- Function : Author
C. Darren Dowell
- Function : Author
Emily Drabek-Maunder
- Function : Author
Hao-Yuan Duan
- Function : Author
Stewart P. S. Eyres
- Function : Author
Sam Falle
- Function : Author
Lapo Fanciullo
- Function : Author
Jason Fiege
- Function : Author
Erica Franzmann
- Function : Author
Per Friberg
- Function : Author
Rachel K. Friesen
- Function : Author
Gary Fuller
- Function : Author
Tim Gledhill
- Function : Author
Sarah F. Graves
- Function : Author
Jane S. Greaves
- Function : Author
Matt J. Griffin
- Function : Author
Qilao Gu
- Function : Author
Ilseung Han
- Function : Author
Jennifer Hatchell
- Function : Author
Saeko S. Hayashi
- Function : Author
Wayne Holland
- Function : Author
Martin Houde
- Function : Author
Tsuyoshi Inoue
- Function : Author
Shu-Ichiro Inutsuka
- Function : Author
Kazunari Iwasaki
- Function : Author
Il-Gyo Jeong
- Function : Author
Yoshihiro Kanamori
- Function : Author
Ji-Hyun Kang
- Function : Author
Miju Kang
- Function : Author
Sung-Ju Kang
- Function : Author
Akimasa Kataoka
- Function : Author
Koji S. Kawabata
- Function : Author
Francisca Kemper
- Function : Author
Jongsoo Kim
- Function : Author
Kyoung Hee Kim
- Function : Author
Mi-Ryang Kim
- Function : Author
Shinyoung Kim
- Function : Author
Jason M. Kirk
- Function : Author
Masato I. N. Kobayashi
- Function : Author
Vera Konyves
- Function : Author
Jungmi Kwon
- Function : Author
Kevin M. Lacaille
- Function : Author
Hyeseung Lee
- Function : Author
Jeong-Eun Lee
- Function : Author
Sang-Sung Lee
- Function : Author
Yong-Hee Lee
- Function : Author
Dalei Li
- Function : Author
Di Li
- Function : Author
Hua-Bai Li
- Function : Author
Hong-Li Liu
- Function : Author
Junhao Liu
- Function : Author
A. -Ran Lyo
- Function : Author
Masafumi Matsumura
- Function : Author
Brenda C. Matthews
- Function : Author
Gerald H. Moriarty-Schieven
- Function : Author
Tetsuya Nagata
- Function : Author
Fumitaka Nakamura
- Function : Author
Hiroyuki Nakanishi
- Function : Author
Nagayoshi Ohashi
- Function : Author
Geumsook Park
- Function : Author
Harriet Parsons
- Function : Author
Enzo Pascale
- Function : Author
Nicolas Peretto
- Function : Author
Andy Pon
- Function : Author
Tae-Soo Pyo
- Function : Author
Lei Qian
- Function : Author
Ramprasad Rao
- Function : Author
Mark G. Rawlings
- Function : Author
Brendan Retter
- Function : Author
John Richer
- Function : Author
Andrew Rigby
- Function : Author
Sarah Sadavoy
- Function : Author
Hiro Saito
- Function : Author
Giorgio Savini
- Function : Author
Anna M. M. Scaife
- Function : Author
Masumichi Seta
- Function : Author
Hiroko Shinnaga
- Function : Author
Ya-Wen Tang
- Function : Author
Kohji Tomisaka
- Function : Author
Yusuke Tsukamoto
- Function : Author
Sven van Loo
- Function : Author
Hongchi Wang
- Function : Author
Anthony P. Whitworth
- Function : Author
Hsi-Wei Yen
- Function : Author
Hyunju Yoo
- Function : Author
Jinghua Yuan
- Function : Author
Hyeong-Sik Yun
- Function : Author
Tetsuya Zenko
- Function : Author
Chuan-Peng Zhang
- Function : Author
Guoyin Zhang
- Function : Author
Ya-Peng Zhang
- Function : Author
Jianjun Zhou
- Function : Author
Lei Zhu
- Function : Author
Abstract
We present the 850 μm polarization observations toward the IC 5146 filamentary cloud taken using the Submillimetre Common-User Bolometer Array 2 (SCUBA-2) and its associated polarimeter (POL-2), mounted on the James Clerk Maxwell Telescope, as part of the B-fields In STar forming Regions Observations. This work is aimed at revealing the magnetic field morphology within a core-scale (≲1.0 pc) hub-filament structure (HFS) located at the end of a parsec-scale filament. To investigate whether the observed polarization traces the magnetic field in the HFS, we analyze the dependence between the observed polarization fraction and total intensity using a Bayesian approach with the polarization fraction described by the Rice likelihood function, which can correctly describe the probability density function of the observed polarization fraction for low signal-to-noise ratio data. We find a power-law dependence between the polarization fraction and total intensity with an index of 0.56 in A V ∼ 20-300 mag regions, suggesting that the dust grains in these dense regions can still be aligned with magnetic fields in the IC 5146 regions. Our polarization maps reveal a curved magnetic field, possibly dragged by the contraction along the parsec-scale filament. We further obtain a magnetic field strength of 0.5 ± 0.2 mG toward the central hub using the Davis-Chandrasekhar-Fermi method, corresponding to a mass-to-flux criticality of ∼1.3 ± 0.4 and an Alfvénic Mach number of <0.6. These results suggest that gravity and magnetic field are currently of comparable importance in the HFS and that turbulence is less important.