The JCMT BISTRO Survey: A Spiral Magnetic Field in a Hub-filament Structure, Monoceros R2
Artikel i vetenskaplig tidskrift, 2022
We present and analyze observations of polarized dust emission at 850 μm toward the central 1 × 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 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 C18O (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 ± 0.06 mG, and the mean critical mass-to-flux ratio is 0.47 ± 0.02. Additionally, the mean Alfvén Mach number is 0.35 ± 0.01. This suggests that, in Mon R2, the magnetic fields provide resistance against large-scale gravitational collapse, and the magnetic pressure exceeds the 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 subcritical.
Författare
Jihye Hwang
Korea Astronomy and Space Science Institute
University of Science and Technology (UST)
Jongsoo Kim
Korea Astronomy and Space Science Institute
University of Science and Technology (UST)
Kate Pattle
University College London (UCL)
Chang Won Lee
University of Science and Technology (UST)
Korea Astronomy and Space Science Institute
Patrick M. Koch
Academia Sinica
D. Johnstone
National Research Council Canada
University of Victoria
Kohji Tomisaka
National Astronomical Observatory of Japan
The Graduate University for Advanced Studies (SOKENDAI)
Anthony Whitworth
Cardiff University
Ray S. Furuya
Tokushima University
Ji-hyun Kang
Korea Astronomy and Space Science Institute
A. Lyo
Korea Astronomy and Space Science Institute
Eun Jung Chung
Chungnam National University
Doris Arzoumanian
National Astronomical Observatory of Japan
Geumsook Park
Korea Astronomy and Space Science Institute
Woojin Kwon
Seoul National University
Shinyoung Kim
Korea Astronomy and Space Science Institute
Motohide Tamura
University of Tokyo
National Astronomical Observatory of Japan
National Institutes of Natural Sciences
Jungmi Kwon
University of Tokyo
Archana Soam
Indian Institute of Astrophysics
Ilseung Han
University of Science and Technology (UST)
Korea Astronomy and Space Science Institute
Thiem Hoang
University of Science and Technology (UST)
Korea Astronomy and Space Science Institute
Kyoung Hee Kim
Korea Astronomy and Space Science Institute
Takashi Onaka
Faculty of Science and Engineering
University of Tokyo
Chakali Eswaraiah
Indian Institute of Science Education & Research (IISER)
D. Ward-Thompson
University of Central Lancashire
Hong-Li Liu
Yunnan University
X. D. Tang
Xinjiang Astronomical Observatory
Wen Ping Chen
National Central University
Masafumi Matsumura
Kagawa University
Thuong Duc Hoang
University of Tokyo
Vietnam Academy of Science and Technology
Zhiwei Chen
Chinese Academy of Sciences
Valentin J. M. Le Gouellec
Universities Space Research Association
Université Paris-Saclay
F. Kirchschlager
University College London (UCL)
Frédérick Poidevin
Universidad de la Laguna
Instituto de Astrofísica de Canarias
Pierre Bastien
Université de Montréal
Keping Qiu
Nanjing University
Tetsuo Hasegawa
National Astronomical Observatory of Japan
Shih-Ping Lai
Academia Sinica
National Tsing Hua University
Do Young Byun
University of Science and Technology (UST)
Korea Astronomy and Space Science Institute
Jungyeon Cho
Chungnam National University
Minho Choi
Korea Astronomy and Space Science Institute
Youngwoo Choi
Seoul National University
Yunhee Choi
Korea Astronomy and Space Science Institute
Il-Gyo Jeong
Korea Astronomy and Space Science Institute
Kyungpook National University
Miju Kang
Korea Astronomy and Space Science Institute
Hyosung Kim
Seoul National University
Kee-Tae Kim
University of Science and Technology (UST)
Korea Astronomy and Space Science Institute
Jeong Eun Lee
Seoul National University
Sang Sung Lee
Korea Astronomy and Space Science Institute
University of Science and Technology (UST)
Yong-Hee Lee
East Asian Observatory
Kyung Hee University
Hyeseung Lee
Chungnam National University
Mi-Ryang Kim
Seoul National University
Hyunju Yoo
Chungnam National University
Hyeong-Sik Yun
Korea Astronomy and Space Science Institute
Michael Chun-Yuan Chen
University of Victoria
J. Di Francesco
University of Victoria
National Research Council Canada
J. Fiege
University of Manitoba
Laura M. Fissel
Queen's University
Erica Franzmann
University of Manitoba
Kevin Lacaille
McMaster University
Dalhousie University
B. C. Matthews
University of Victoria
National Research Council Canada
S. I. Sadavoy
Queen's University
Gerald H. Moriarty-Schieven
National Research Council Canada
M. Tahani
Stanford University
National Research Council Canada
Tao-Chung Ching
Zhejiang Lab
Y. Sophia Dai
Chinese Academy of Sciences
Yan Duan
Chinese Academy of Sciences
Qilao Gu
Chinese Academy of Sciences
Chi Yan Law
Chinese University of Hong Kong
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
Dalei Li
Xinjiang Astronomical Observatory
D. Li
Zhejiang Lab
Guangxing Li
Yunnan University
Hua-Bai Li
Chinese Academy of Sciences
Tie Liu
Chinese Academy of Sciences
X. Lu
Chinese Academy of Sciences
Lei Qian
Chinese Academy of Sciences
Hongchi Wang
Chinese Academy of Sciences
Jintai Wu
Nanjing University
Jinjin Xie
Chinese Academy of Sciences
Jinghua Yuan
Chinese Academy of Sciences
Chuan-Peng Zhang
Chinese Academy of Sciences
Guoyin Zhang
Chinese Academy of Sciences
Yapeng Zhang
Beijing Normal University
Jianjun Zhou
Xinjiang Astronomical Observatory
Lei Zhu
Chinese Academy of Sciences
David Berry
East Asian Observatory
P. Friberg
East Asian Observatory
Sarah F. Graves
East Asian Observatory
Junhao Liu
East Asian Observatory
Steve Mairs
East Asian Observatory
Harriet Parsons
East Asian Observatory
M.G. Rawlings
Gemini Observatory North
East Asian Observatory
Yasuo Doi
University of Tokyo
Saeko Hayashi
National Astronomical Observatory of Japan
Charles L. H. Hull
Atacama Large Millimeter-submillimeter Array (ALMA)
National Astronomical Observatory of Japan
Tsuyoshi Inoue
Konan University
Shu-Ichiro Inutsuka
Nagoya University
Kazunari Iwasaki
Doshisha University
Akimasa Kataoka
National Astronomical Observatory of Japan
Astrophysical Journal
0004-637X (ISSN) 1538-4357 (eISSN)
Vol. 941 1 51Ämneskategorier (SSIF 2011)
Astronomi, astrofysik och kosmologi
Geofysik
Fusion, plasma och rymdfysik
DOI
10.3847/1538-4357/ac99e0