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Journal Articles The Astrophysical Journal Year : 2019

JCMT BISTRO Survey: Magnetic Fields within the Hub-filament Structure in IC 5146

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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.

Dates and versions

insu-03703878 , version 1 (24-06-2022)

Identifiers

Cite

Jia-Wei Wang, Shih-Ping Lai, Chakali Eswaraiah, Kate Pattle, James Di Francesco, et al.. JCMT BISTRO Survey: Magnetic Fields within the Hub-filament Structure in IC 5146. The Astrophysical Journal, 2019, 876, ⟨10.3847/1538-4357/ab13a2⟩. ⟨insu-03703878⟩
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