2019年5月1日
JCMT BISTRO Survey: Magnetic Fields within the Hub-filament Structure in IC 5146
ASTROPHYSICAL JOURNAL
- 巻
- 876
- 号
- 1
- 記述言語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.3847/1538-4357/ab13a2
- 出版者・発行元
- IOP PUBLISHING LTD
We present the 850 mu 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 (less than or similar to 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 A(v) similar to 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 rev
- リンク情報
- ID情報
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- DOI : 10.3847/1538-4357/ab13a2
- ISSN : 0004-637X
- eISSN : 1538-4357
- SCOPUS ID : 85067175393