Magnetic Fields in Massive Star-forming Regions (MagMaR). VI. Magnetic Field Dragging in the Filamentary High-mass Star-forming Region G35.20–0.74N Due to Gravity
Year: 2025
Type: article
Abstract: We investigate the magnetic field orientation and strength in the massive star-forming region G35.20-0.74N (G35), using polarized dust emission data obtained with the Atacama Large Millimeter/submillimeter Array (ALMA) as part of the Magnetic fields in Massive star-forming Regions (MagMaR) survey. The G35 region shows a filamentary structure (a length of ∼0.1 pc) with six bright cores located along the filament’s long axis. Magnetic field strengths across the G35 region range from 0.2 to 4.4 mG with a mean value of 0.8 ± 0.4 mG. The mass-to-flux ratio ( λ ) varies from 0.1 to 6.0, the critical value. The highest values are found locally around cores, whereas the remains of the filament are subcritical. A H 13 CO + (3–2) velocity gradient of 29 km s −1 pc −1 is evident along the filament’s long axis, aligned with the magnetic field direction. At larger scales (∼0.1 pc), the magnetic field lines appear roughly perpendicular to the filament’s long axis, in contrast to the smaller-scale structure (∼0.003 pc) traced by ALMA. The magnetic field lines could be dragged along the filament as a result of the gas motion induced by the gravitational potential of the filament. Six cores in the filament have similar spacings between 0.02 and 0.04 pc. The initial filament fragmentation could have produced a core spacing of 0.06 pc, following filament fragmentation theory, and the current core spacing is the result of cores comoving with the gas along the filament. This core migration could occur in a few 10 4 yr, consistent with high-mass star formation timescales.
Source: The Astronomical Journal
Authors: Jihye Hwang, Patricio Sanhueza, Josep Miquel Girart, Ian W. Stephens, Maria T. Beltrán, Chi Yan Law, Qizhou Zhang, Junhao Liu, Paulo Cortés, Fernando A. Olguin, Patrick M. Koch, Fumitaka Nakamura, Piyali Saha, Jia-Wei Wang, Fengwei Xu, Henrik Beuther, Kaho Morii, Manuel Fernández López, Wenyu Jiao, Kee-Tae Kim, Shanghuo Li, Luis A. Zapata, Jongsoo Kim, Spandan Choudhury, Yu Cheng, Kate Pattle, Chakali Eswaraiah, Panigrahy Sandhyarani, L. K. Dewangan, O. R. Jadhav
Institutions: Kyushu University, The University of Tokyo, Institute of Space Sciences, Institut d'Estudis Espacials de Catalunya, Worcester State University, Arcetri Astrophysical Observatory, National Institute for Astrophysics, Center for Astrophysics Harvard & Smithsonian, National Astronomical Observatory of Japan, National Radio Astronomy Observatory, Atacama Large Millimeter Submillimeter Array, National Institutes of Natural Sciences, Kyoto University, Yukawa Institute for Theoretical Physics, Institute of Astronomy and Astrophysics, Academia Sinica, Academia Sinica, The Graduate University for Advanced Studies, SOKENDAI, East Asian Observatory, Max Planck Institute for Astronomy, Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto Argentino de Radioastronomía, Chinese Academy of Sciences, Shanghai Astronomical Observatory, Korea Astronomy and Space Science Institute, Korea University of Science and Technology, Nanjing University, Universidad Nacional Autónoma de México, University College London, Indian Institute of Science Education and Research Mohali, Physical Research Laboratory, Indian Institute of Science Education and Research, Tirupati, Indian Institute of Technology Gandhinagar
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,499
Funders: National Science Foundation, National Aeronautics and Space Administration, Arthritis National Research Foundation, National Radio Astronomy Observatory, Universities Space Research Association, National Research Foundation, Korea Astronomy and Space Science Institute, National Astronomical Observatory of Japan, Japan Society for the Promotion of Science, Science and Engineering Research Board, National Institutes of Natural Sciences, Agencia Estatal de Investigación
Awards: G1175115578, G2262748287, G2469010403, G2650114919, G300979063, G34346518, G3456374072, G3480869486, G4059579084, G425668148, G4526231891, G4534730369, G464105488, 原子炉による悪性皮膚腫瘍の選択的治療, G5080475149, Investigating Magnetic Fields in High-Mass Pre-stellar Cores using ALMA, G5905308874, Unveiling High-Mass Star Formation in Low Metallicity Environments through state-of-the-art Observations, G617610489, Survey of multiscale magnetic fields in massive star formation region Cygnus-X, G7084143925, 古代説話における諸寺縁起の研究
OpenAlex ID: W7116130972