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25 April 2024 |
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The JCMT BISTRO Survey: A Spiral Magnetic Field in a Hub-Filament Structure, Monoceros R2 | | Jihye Hwang
; Jongsoo Kim
; Kate Pattle
; Chang Won Lee
; Patrick M. Koch
; Doug Johnstone
; Kohji Tomisaka
; Anthony Whitworth
; Ray S. Furuya
; Ji-hyun Kang
; A-Ran Lyo
; Eun Jung Chung
; Doris Arzoumanian
; Geumsook Park
; Woojin Kwon
; Shinyoung Kim
; Motohide Tamura
; Jungmi Kwon
; Archana Soam
; Ilseung Han
; Thiem Hoang
; Kyoung Hee Kim
; Takashi Onaka
; Eswaraiah Chakali
; Derek Ward-Thompson
; Hong-Li Liu
; Xindi Tang
; Wen Ping Chen
; Masafumi Matsumura
; Thuong Duc Hoang
; Zhiwei Chen
; Valentin J. M. Le Gouellec
; Florian Kirchschlager
; Fr ed erick Poidevin
; Pierre Bastien
; Keping Qiu
; Tetsuo Hasegawa
; Shih-Ping Lai
; Do-Young Byun
; Jungyeon Cho
; Minho Choi
; Youngwoo Choi
; Yunhee Choi
; Il-Gyo Jeong
; Miju Kang
; Hyosung Kim
; Kee-tae Kim
; Jeong-Eun Lee
; Sang-sung Lee
; Yong-Hee Lee
; Hyeseung Lee
; Mi-Ryang Kim
; Hyunju Yoo
; Hyeong-Sik Yun
; Mike Chen
; James Di Francesco
; Jason Fiege
; Laura M. Fissel
; Erica Franzmann
; Martin Houde
; Kevin Lacaille
; Brenda Matthews
; Sarah Sadavoy
; Gerald Moriarty-Schieven
; Mehrnoosh Tahani
; Tao-Chung Ching
; Y. Sophia Dai
; Yan Duan
; Qilao Gu
; Chi-Yan Law
; Dalei Li
; Di Li
; Guangxing Li
; Hua-bai Li
; Tie Liu
; Xing Lu
; Lei Qian
; Hongchi Wang
; Jintai Wu
; Jinjin Xie
; Jinghua Yuan
; Chuan-Peng Zhang
; Guoyin Zhang
; Yapeng Zhang
; Jianjun Zhou
; Lei Zhu
; David Berry
; Per Friberg
; Sarah Graves
; Junhao Liu
; Steve Mairs
; Harriet Parsons
; Mark Rawlings
; Yasuo Doi
; Saeko Hayashi
; Charles L. H. Hull
; Tsuyoshi Inoue
; Shu-ichiro Inutsuka
; Kazunari Iwasaki
; Akimasa Kataoka
; Koji Kawabata
; Gwanjeong Kim
; Masato I.N. Kobayashi
; Tetsuya Nagata
; Fumitaka Nakamura
; Hiroyuki Nakanishi
; Tae-Soo Pyo
; Hiro Saito
; Masumichi Seta
; Yoshito Shimajiri
; Hiroko Shinnaga
; Yusuke Tsukamoto
; Tetsuya Zenko
; Huei-Ru Vivien Chen
; Hao-Yuan Duan
; Lapo Fanciullo
; Francisca Kemper
; Chin-Fei Lee
; Sheng-Jun Lin
; Sheng-Yuan Liu
; Nagayoshi Ohashi
; Ramprasad Rao
; Ya-Wen Tang
; Jia-Wei Wang
; Meng-Zhe Yang
; Hsi-Wei Yen
; Tyler L. Bourke
; Antonio Chrysostomou
; Victor Debattista
; David Eden
; Stewart Eyres
; Sam Falle
; Gary Fuller
; Tim Gledhill
; Jane Greaves
; Matt Griffin
; Jennifer Hatchell
; Janik Karoly
; Jason Kirk
; Vera Konyves
; Steven Longmore
; Sven van Loo
; Ilse de Looze
; Nicolas Peretto
; Felix Priestley
; Jonathan Rawlings
; Brendan Retter
; John Richer
; Andrew Rigby
; Giorgio Savini
; Anna Scaife
; Serena Viti
; Pham Ngoc Diep
; Nguyen Bich Ngoc
; Le Ngoc Tram
; Philippe Andre
; Simon Coude
; C. Darren Dowell
; Rachel Friesen
; Jean-Franc ois Robitaille
; | | Date: |
12 Oct 2022 | | Abstract: | We present and analyze observations of polarized dust emission at 850 $mu$m
towards the central 1 pc $ imes$ 1 pc hub-filament structure of Monoceros R2
(Mon R2). The data are obtained with SCUBA-2/POL-2 on the James Clerk Maxwell
Telescope (JCMT) as part of the BISTRO (B-fields in Star-forming Region
Observations) survey. The orientations of the magnetic field follow the spiral
structure of Mon R2, which are well-described by an axisymmetric magnetic field
model. We estimate the turbulent component of the magnetic field using the
angle difference between our observations and the best-fit model of the
underlying large-scale mean magnetic field. This estimate is used to calculate
the magnetic field strength using the Davis-Chandrasekhar-Fermi method, for
which we also obtain the distribution of volume density and velocity dispersion
using a column density map derived from $Herschel$ data and the C$^{18}$O ($J$
= 3-2) data taken with HARP on the JCMT, respectively. We make maps of magnetic
field strengths and mass-to-flux ratios, finding that magnetic field strengths
vary from 0.02 to 3.64 mG with a mean value of 1.0 $pm$ 0.06 mG, and the mean
critical mass-to-flux ratio is 0.47 $pm$ 0.02. Additionally, the mean Alfvén
Mach number is 0.35 $pm$ 0.01. This suggests that in Mon R2, magnetic fields
provide resistance against large-scale gravitational collapse, and magnetic
pressure exceeds turbulent pressure. We also investigate the properties of each
filament in Mon R2. Most of the filaments are aligned along the magnetic field
direction and are magnetically sub-critical. | | Source: | arXiv, 2210.05937 | | Services: | Forum | Review | PDF | Favorites | |
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