The Magnetic Field in Quiescent Star-forming Filament G16.96+0.27
Abstract We present 850 μ m 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 μ G and ∼60 μ G 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.
Authors
- Tie Liu (ORCID: https://orcid.org/0000-0002-5286-2564)
- Patricio Sanhueza (ORCID: https://orcid.org/0000-0002-7125-7685)
- Xunchuan Liu (ORCID: https://orcid.org/0000-0001-8315-4248)
- Zhi-Qiang Shen (ORCID: https://orcid.org/0000-0003-3540-8746)
- Patrick M. Koch (ORCID: https://orcid.org/0000-0003-2777-5861)
- M. Juvela (ORCID: https://orcid.org/0000-0002-5809-4834)
- Naomi Hirano (ORCID: https://orcid.org/0000-0001-9304-7884)
- Chang Won Lee (ORCID: https://orcid.org/0000-0002-3179-6334)
- Xing Lu (ORCID: https://orcid.org/0000-0003-2619-9305)
- Dana Alina (ORCID: https://orcid.org/0000-0001-5403-356X)
- Woojin Kwon (ORCID: https://orcid.org/0000-0003-4022-4132)
- Kate Pattle (ORCID: https://orcid.org/0000-0002-8557-3582)
- Doug Johnstone (ORCID: https://orcid.org/0000-0002-6773-459X)
- J. Montillaud (ORCID: https://orcid.org/0000-0001-7032-632X)
- James Di Francesco (ORCID: https://orcid.org/0000-0002-9289-2450)
- Pak Shing Li (ORCID: https://orcid.org/0000-0001-8077-7095)
- Ken’ichi Tatematsu (ORCID: https://orcid.org/0000-0002-8149-8546)
- Qilao Gu (ORCID: https://orcid.org/0000-0002-2826-1902)
- Kee‐Tae Kim
- I. Ristorcelli (ORCID: https://orcid.org/0000-0002-1469-6323)
- Sihan 斯汗 Jiao 焦
- Qizhou Zhang (ORCID: https://orcid.org/0000-0003-2384-6589)
- Junhao Liu (ORCID: https://orcid.org/0000-0002-4774-2998)
Institutions
- Herzberg Institute of Astrophysics (CA)
- Centre National de la Recherche Scientifique (FR)
- Institute of Astronomy and Astrophysics, Academia Sinica (TW)
- University of Helsinki (FI)
- Université Toulouse III - Paul Sabatier (FR)
- Seoul National University (KR)
- Seoul National University of Education (KR)
- Université Fédérale de Toulouse Midi-Pyrénées (FR)
- National Institutes of Natural Sciences (JP)
- The Graduate University for Advanced Studies, SOKENDAI (JP)
- University of Victoria (CA)
- Shanghai Astronomical Observatory (CN)
- Helsinki Institute of Physics (FI)
- Korea Astronomy and Space Science Institute (KR)
- Institut UTINAM (FR)
- Center for Astrophysics Harvard & Smithsonian (US)
- National Astronomical Observatory of Japan (JP)
- University College London (GB)
- Nazarbayev University (KZ)
- Korea University of Science and Technology (KR)
Publication Details
- Journal
- The Astrophysical Journal
- Published
- 2024-11-27
- DOI
- https://doi.org/10.3847/1538-4357/ad8912
- Citations
- 3
- Primary Topic
- Astrophysics and Star Formation Studies
- Type
- article
- Field-Weighted Citation Impact
- 0.99
Funders
- Natural Science Foundation of Shanghai
- Royal Society
- National Research Foundation
- National Natural Science Foundation of China
- Academy of Finland
- Chinese Academy of Sciences
- Korea Astronomy and Space Science Institute
- National Research Foundation of Korea
- Shanghai Rising-Star Program
- Ministry of Science and ICT, South Korea
- Science and Technology Facilities Council
- Japan Society for the Promotion of Science
- CAS-SAFEA International Partnership Program for Creative Research Teams
- National Key Research and Development Program of China