ID | 117848 |
タイトル別表記 | Magnetic fields and outflows in CB 54
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著者 |
Pattle, Kate
University College London|National University of Ireland Galway
Lai, Shih-Ping
National Tsing Hua University|Academia Sinica Institute of Astronomy and Astrophysics
Sadavoy, Sarah
Queen’s University
Coudé, Simon
NASA Ames Research Center
Wolf, Sebastian
Christian-Albrechts-Universität zu Kiel
Kwon, Woojin
Seoul National University
Lee, Chang Won
Korea Astronomy and Space Science Institute|University of Science and Technology
Zielinski, Niko
Christian-Albrechts-Universität zu Kiel
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キーワード | stars
formation –ISM
individual objects
CB 54 –ISM
magnetic fields –submillimetre
ISM
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資料タイプ |
学術雑誌論文
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抄録 | We have observed the large Bok globule CB 54 in 850-μm polarized light using the POL-2 polarimeter on the James Clerk Maxwell Telescope (JCMT). We find that the magnetic field in the periphery of the globule shows a significant, ordered deviation from the mean-field direction in the globule centre. This deviation appears to correspond with the extended but relatively weak 12CO outflow emanating from the Class 0 sources at the centre of the globule. Energetics analysis suggests that if the outflow is reshaping the magnetic field in the globule’s periphery, then we can place an upper limit of <27μG on the magnetic field strength in the globule’s periphery. Comparison with archival Planck and CARMA measurements shows that the field in the centre of the globule is consistent over several orders of magnitude in size scale, and oriented parallel to the density structure in the region in projection. We thus hypothesize that while non-thermal motions in the region may be sub-Alfvénic, the magnetic field is subdominant to gravity over a wide range of size scales. Our results suggest that even a relatively weak outflow may be able to significantly reshape magnetic fields in star-forming regions on scales >0.1 pc.
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掲載誌名 |
Monthly Notices of the Royal Astronomical Society
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ISSN | 13652966
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出版者 | Oxford University Press|The Royal Astronomical Society
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巻 | 515
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号 | 1
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開始ページ | 1026
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終了ページ | 1036
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発行日 | 2022-06-23
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権利情報 | This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
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言語 |
eng
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部局 |
教養教育院
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