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Journal Articles The Astrophysical Journal Year : 2018

A Holistic Perspective on the Dynamics of G035.39-00.33: The Interplay between Gas and Magnetic Fields

Tie Liu
  • Function : Author
Pak Shing Li
  • Function : Author
Mika Juvela
  • Function : Author
Kee-Tae Kim
Neal J. Evans
  • Function : Author
James Di Francesco
Sheng-Yuan Liu
  • Function : Author
Jinghua Yuan
  • Function : Author
Ken'Ichi Tatematsu
  • Function : Author
Qizhou Zhang
Derek Ward-Thompson
Gary Fuller
  • Function : Author
Paul F. Goldsmith
  • Function : Author
P. M. Koch
  • Function : Author
Patricio Sanhueza
Sung-Ju Kang
  • Function : Author
Huei-Ru Chen
  • Function : Author
N. Hirano
  • Function : Author
Yuefang Wu
  • Function : Author
Vlas Sokolov
  • Function : Author
Chang Won Lee
  • Function : Author
Glenn J. White
  • Function : Author
Ke Wang
David Eden
  • Function : Author
Di Li
  • Function : Author
Mark Thompson
  • Function : Author
Kate M. Pattle
  • Function : Author
Archana Soam
  • Function : Author
Evert Nasedkin
  • Function : Author
Jongsoo Kim
  • Function : Author
Gwanjeong Kim
  • Function : Author
Shih-Ping Lai
  • Function : Author
Geumsook Park
  • Function : Author
Keping Qiu
Chuan-Peng Zhang
  • Function : Author
Dana Alina
  • Function : Author
Chakali Eswaraiah
  • Function : Author
Edith Falgarone
  • Function : Author
Michel Fich
  • Function : Author
Jane Greaves
  • Function : Author
Q. -L. Gu
  • Function : Author
Woojin Kwon
  • Function : Author
Hua-Bai Li
  • Function : Author
Johanna Malinen
  • Function : Author
Harriet Parsons
  • Function : Author
Sheng-Li Qin
  • Function : Author
Mark G. Rawlings
  • Function : Author
Zhi-Yuan Ren
  • Function : Author
Mengyao Tang
  • Function : Author
Y. -W. Tang
  • Function : Author
L. V. Toth
  • Function : Author
Jiawei Wang
  • Function : Author
Jan Wouterloot
  • Function : Author
H. -W. Yi
  • Function : Author
H. -W. Zhang
  • Function : Author

Abstract

Magnetic field plays a crucial role in shaping molecular clouds and regulating star formation, yet the complete information on the magnetic field is not well constrained owing to the limitations in observations. We study the magnetic field in the massive infrared dark cloud G035.39-00.33 from dust continuum polarization observations at 850 μm with SCUBA-2/POL-2 at JCMT for the first time. The magnetic field tends to be perpendicular to the densest part of the main filament (F M), whereas it has a less defined relative orientation in the rest of the structure, where it tends to be parallel to some diffuse regions. A mean plane-of-the-sky magnetic field strength of ∼50 μG for F M is obtained using the Davis-Chandrasekhar-Fermi method. Based on 13CO (1-0) line observations, we suggest a formation scenario of F M due to large-scale (∼10 pc) cloud-cloud collision. Using additional NH3 line data, we estimate that F M will be gravitationally unstable if it is only supported by thermal pressure and turbulence. The northern part of F M, however, can be stabilized by a modest additional support from the local magnetic field. The middle and southern parts of F M are likely unstable even if the magnetic field support is taken into account. We claim that the clumps in F M may be supported by turbulence and magnetic fields against gravitational collapse. Finally, we identified for the first time a massive (∼200 M ), collapsing starless clump candidate, “c8,” in G035.39-00.33. The magnetic field surrounding “c8” is likely pinched, hinting at an accretion flow along the filament.

Dates and versions

insu-03678202 , version 1 (25-05-2022)

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Tie Liu, Pak Shing Li, Mika Juvela, Kee-Tae Kim, Neal J. Evans, et al.. A Holistic Perspective on the Dynamics of G035.39-00.33: The Interplay between Gas and Magnetic Fields. The Astrophysical Journal, 2018, 859, ⟨10.3847/1538-4357/aac025⟩. ⟨insu-03678202⟩
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