The Magnetic Field in Quiescent Star-forming Filament G16.96+0.27
Gu Q.-L. Liu T. Shen Z.-Q. Jiao S. Montillaud J. Juvela M. Lu X. Lee C.W. Liu J. Li P.S. Liu X. Johnstone D. Kwon W. Kim K.-T. Tatematsu K. Sanhueza P. Ristorcelli I. Koch P. Zhang Q. Pattle K. Hirano N. Alina D. Di Francesco J.
1 December 2024Institute of Physics
Astrophysical Journal
2024#976Issue 2
We present 850 μm thermal dust polarization observations with a resolution of 14.″4 (∼0.13 pc) toward an infrared dark cloud G16.96+0.27 using James Clerk Maxwell Telescope/POL-2. The average magnetic field orientation, which roughly agrees with the larger-scale magnetic field orientation traced by the Planck 353 GHz data, is approximately perpendicular to the filament structure. The estimated plane-of-sky magnetic field strength is ∼96 μG and ∼60 μG using two variants of the Davis-Chandrasekhar-Fermi methods. We calculate the virial and magnetic critical parameters to evaluate the relative importance of gravity, the magnetic field, and turbulence. The magnetic field and turbulence are both weaker than gravity, but magnetic fields and turbulence together are equal to gravity, suggesting that G16.96+0.27 is in a quasi-equilibrium state. The alignment between the magnetic field and cloud is found to have a trend moving away from perpendicularity in the dense regions, which may serve as a tracer of potential fragmentation in such quiescent filaments.
Text of the article Перейти на текст статьи
Shanghai Astronomical Observatory, Chinese Academy of Sciences, No.80 Nandan Road Xuhui, Shanghai, 200030, China
National Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Chaoyang, Beijing, 100101, China
Université de Franche-Comté, CNRS, Institut UTINAM, OSU THETA, Besançon, F-25000, France
Department of Physics, University of Helsinki, PO Box 64, FI-00014, Finland
Korea Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseong-gu, Daejeon, 34055, South Korea
University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon, 34113, South Korea
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan
NRC Herzberg Astronomy and Astrophysics, 5071 West Saanich Road, Victoria, V9E 2E7, BC, Canada
Department of Physics and Astronomy, University of Victoria, Victoria, V8P 5C2, BC, Canada
Department of Earth Science Education, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea
SNU Astronomy Research Center, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea
The Center for Educational Research, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea
Nobeyama Radio Observatory, National Astronomical Observatory of Japan, National Institutes of Natural Sciences Nobeyama, Minamimaki Minamisaku, Nagano, 384-1305, Japan
Astronomical Science Program, Graduate Institute for Advanced Studies, SOKENDAI, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan
IRAP, Université de Toulouse, CNRS, 9 Avenue du Colonel Roche, BP 44346, Toulouse, Cedex 4 31028, France
Academia Sinica Institute of Astronomy and Astrophysics, No. 1, Section 4, Roosevelt Road, Taipei, 10617, Taiwan
Center for Astrophysics ∣ Harvard & Smithsonian, 60 Garden Street, Cambridge, 02138, MA, United States
Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, United Kingdom
Department of Physics, School of Science and Technology, Nazarbayev University, Astana, 010000, Kazakhstan
IRAP, Université de Toulouse CNRS, UPS, CNES, Toulouse, F-31400, France
Department of Physics and Astronomy, University of Victoria, Victoria, V8W 2Y2, BC, Canada
NRC Herzberg Astronomy and Astrophysics, 5071 West Saanich Road, Victoria, V9E 2E7, BC, Canada
Shanghai Astronomical Observatory
National Astronomical Observatories
Université de Franche-Comté
Department of Physics
Korea Astronomy and Space Science Institute
University of Science and Technology
National Astronomical Observatory of Japan
NRC Herzberg Astronomy and Astrophysics
Department of Physics and Astronomy
Department of Earth Science Education
SNU Astronomy Research Center
The Center for Educational Research
Nobeyama Radio Observatory
Astronomical Science Program
IRAP
Academia Sinica Institute of Astronomy and Astrophysics
Center for Astrophysics ∣ Harvard & Smithsonian
Department of Physics and Astronomy
Department of Physics
IRAP
Department of Physics and Astronomy
NRC Herzberg Astronomy and Astrophysics
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026