Details

Autor(en) / Beteiligte

• Wang, Jia-Wei
• Lai, Shih-Ping
• Eswaraiah, Chakali
• Pattle, Kate
• Johnstone, Doug
• Koch, Patrick M.
• Liu, Tie
• Tamura, Motohide
• Furuya, Ray S.
• Ward-Thompson, Derek
• Soam, Archana
• Kim, Kee-Tae
• Lee, Chang Won
• Mairs, Steve
• Arzoumanian, Doris
• Kim, Gwanjeong
• Hwang, Jihye
• Liu, Sheng-Yuan
• Berry, David
• Bastien, Pierre
• Hasegawa, Tetsuo
• Kwon, Woojin
• Qiu, Keping
• André, Philippe
• Aso, Yusuke
• Byun, Do-Young
• Chen, Huei-Ru
• Chen, Wen Ping
• Choi, Minho
• Chrysostomou, Antonio
• Chung, Eun Jung
• Coudé, Simon
• Doi, Yasuo
• Dowell, C. Darren
• Drabek-Maunder, Emily
• Duan, Hao-Yuan
• Falle, Sam
• Fiege, Jason
• Franzmann, Erica
• Friberg, Per
• Gledhill, Tim
• Greaves, Jane S.
• Griffin, Matt J.
• Gu, Qilao
• Han, Ilseung
• Hatchell, Jennifer
• Hayashi, Saeko S.
• Holland, Wayne
• Houde, Martin
• Inoue, Tsuyoshi
• Inutsuka, Shu-ichiro
• Iwasaki, Kazunari
• Kanamori, Yoshihiro
• Kang, Miju
• Kang, Sung-ju
• Kataoka, Akimasa
• Kawabata, Koji S.
• Kemper, Francisca
• Kim, Shinyoung
• Kirk, Jason M.
• Kobayashi, Masato I. N.
• Kwon, Jungmi
• Lacaille, Kevin M.
• Lee, Hyeseung
• Lee, Jeong-Eun
• Lee, Sang-Sung
• Lee, Yong-Hee
• Li, Dalei
• Li, Di
• Li, Hua-bai
• Liu, Hong-Li
• Liu, Junhao
• Lyo, A-Ran
• Matsumura, Masafumi
• Matthews, Brenda C.
• Moriarty-Schieven, Gerald H.
• Nagata, Tetsuya
• Peretto, Nicolas
• Pon, Andy
• Pyo, Tae-Soo
• Rao, Ramprasad
• Rawlings, Mark G.
• Retter, Brendan
• Richer, John
• Rigby, Andrew
• Robitaille, Jean-François
• Saito, Hiro
• Savini, Giorgio
• Scaife, Anna M. M.
• Seta, Masumichi
• Shinnaga, Hiroko
• Tomisaka, Kohji
• Loo, Sven van
• Wang, Hongchi
• Yen, Hsi-Wei
• Yoo, Hyunju
• Yuan, Jinghua
• Yun, Hyeong-Sik
• Zhang, Chuan-Peng
• Zhang, Ya-Peng

Titel

JCMT BISTRO Survey: Magnetic Fields within the Hub-filament Structure in IC 5146

Ist Teil von

• The Astrophysical journal, 2019-05, Vol.876 (1), p.42

Ort / Verlag

Philadelphia: The American Astronomical Society

Erscheinungsjahr

2019

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• We present the 850 m polarization observations toward the IC 5146 filamentary cloud taken using the Submillimetre Common-User Bolometer Array 2 (SCUBA-2) and its associated polarimeter (POL-2), mounted on the James Clerk Maxwell Telescope, as part of the B-fields In STar forming Regions Observations. This work is aimed at revealing the magnetic field morphology within a core-scale ( 1.0 pc) hub-filament structure (HFS) located at the end of a parsec-scale filament. To investigate whether the observed polarization traces the magnetic field in the HFS, we analyze the dependence between the observed polarization fraction and total intensity using a Bayesian approach with the polarization fraction described by the Rice likelihood function, which can correctly describe the probability density function of the observed polarization fraction for low signal-to-noise ratio data. We find a power-law dependence between the polarization fraction and total intensity with an index of 0.56 in AV ∼ 20-300 mag regions, suggesting that the dust grains in these dense regions can still be aligned with magnetic fields in the IC 5146 regions. Our polarization maps reveal a curved magnetic field, possibly dragged by the contraction along the parsec-scale filament. We further obtain a magnetic field strength of 0.5 0.2 mG toward the central hub using the Davis-Chandrasekhar-Fermi method, corresponding to a mass-to-flux criticality of ∼1.3 0.4 and an Alfvénic Mach number of <0.6. These results suggest that gravity and magnetic field are currently of comparable importance in the HFS and that turbulence is less important.