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ID 117848
Title Alternative
Magnetic fields and outflows in CB 54
Author
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
Keywords
stars
formation –ISM
individual objects
CB 54 –ISM
magnetic fields –submillimetre
ISM
Content Type
Journal Article
Description
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.
Journal Title
Monthly Notices of the Royal Astronomical Society
ISSN
13652966
Publisher
Oxford University Press|The Royal Astronomical Society
Volume
515
Issue
1
Start Page
1026
End Page
1036
Published Date
2022-06-23
Rights
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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DOI (Published Version)
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language
eng
TextVersion
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departments
Liberal Arts and Sciences