The JCMT BISTRO Survey: Studying the Complex Magnetic Field of L43

Abstract

We present observations of polarized dust emission at 850 μm from the L43 molecular cloud, which sits in the Ophiuchus cloud complex. The data were taken using SCUBA-2/POL-2 on the James Clerk Maxwell Telescope as a part of the BISTRO large program. L43 is a dense (NH₂ ~ 10²²–10²³ cm⁻²) complex molecular cloud with a submillimeter-bright starless core and two protostellar sources. There appears to be an evolutionary gradient along the isolated filament that L43 is embedded within, with the most evolved source closest to the Sco OB2 association. One of the protostars drives a CO outflow that has created a cavity to the southeast. We see a magnetic field that appears to be aligned with the cavity walls of the outflow, suggesting interaction with the outflow. We also find a magnetic field strength of up to ∼160 ± 30 μG in the main starless core and up to ∼90 ± 40 μG in the more diffuse, extended region. These field strengths give magnetically super- and subcritical values, respectively, and both are found to be roughly trans-Alfvénic. We also present a new method of data reduction for these denser but fainter objects like starless cores.

Metadata

Item Type:	Article
Authors/Creators:	Karoly, J. https://orcid.org/0000-0001-5996-3600 Ward-Thompson, D. https://orcid.org/0000-0003-1140-2761 Pattle, K. https://orcid.org/0000-0002-8557-3582 Berry, D. https://orcid.org/0000-0001-6524-2447 Whitworth, A. https://orcid.org/0000-0002-1178-5486 Kirk, J. https://orcid.org/0000-0002-4552-7477 Bastien, P. https://orcid.org/0000-0002-0794-3859 Ching, T.-C. https://orcid.org/0000-0001-8516-2532 Coudé, S. https://orcid.org/0000-0002-0859-0805 Hwang, J. https://orcid.org/0000-0001-7866-2686 Kwon, W. https://orcid.org/0000-0003-4022-4132 Soam, A. https://orcid.org/0000-0002-6386-2906 Wang, J.-W. https://orcid.org/0000-0002-6668-974X Hasegawa, T. https://orcid.org/0000-0003-1853-0184 Lai, S.-P. https://orcid.org/0000-0001-5522-486X Qiu, K. https://orcid.org/0000-0002-5093-5088 Arzoumanian, D. https://orcid.org/0000-0002-1959-7201 Bourke, T.L. https://orcid.org/0000-0001-7491-0048 Byun, D.-Y. Chen, H.-R.V. https://orcid.org/0000-0002-9774-1846 Chen, W.P. https://orcid.org/0000-0003-0262-272X Chen, M. Chen, Z. Cho, J. https://orcid.org/0000-0003-1725-4376 Choi, M. Choi, Y. Choi, Y. Chrysostomou, A. Chung, E.J. https://orcid.org/0000-0003-0014-1527 Dai, S. Debattista, V. https://orcid.org/0000-0001-7902-0116 Di Francesco, J. https://orcid.org/0000-0002-9289-2450 Diep, P.N. https://orcid.org/0000-0002-2808-0888 Doi, Y. https://orcid.org/0000-0001-8746-6548 Duan, H.-Y. Duan, Y. Eswaraiah, C. https://orcid.org/0000-0003-4761-6139 Fanciullo, L. https://orcid.org/0000-0001-9930-9240 Fiege, J. Fissel, L.M. https://orcid.org/0000-0002-4666-609X Franzmann, E. Friberg, P. Friesen, R. Fuller, G. Furuya, R. Gledhill, T. https://orcid.org/0000-0002-2859-4600 Graves, S. Greaves, J. Griffin, M. Gu, Q. Han, I. Hoang, T. https://orcid.org/0000-0003-2017-0982 Houde, M. https://orcid.org/0000-0003-4420-8674 Hull, C.L.H. https://orcid.org/0000-0002-8975-7573 Inoue, T. https://orcid.org/0000-0002-7935-8771 Inutsuka, S.-I. https://orcid.org/0000-0003-4366-6518 Iwasaki, K. https://orcid.org/0000-0002-2707-7548 Jeong, I.-G. https://orcid.org/0000-0002-5492-6832 Johnstone, D. https://orcid.org/0000-0002-6773-459X Könyves, V. Kang, J.-H. https://orcid.org/0000-0001-7379-6263 Kang, M. https://orcid.org/0000-0002-5016-050X Kataoka, A. https://orcid.org/0000-0003-4562-4119 Kawabata, K. Kemper, F. https://orcid.org/0000-0003-2743-8240 Kim, J. https://orcid.org/0000-0002-1229-0426 Kim, S. https://orcid.org/0000-0001-9333-5608 Kim, G. https://orcid.org/0000-0003-2011-8172 Kim, K.H. https://orcid.org/0000-0001-9597-7196 Kim, M.-R. Kim, K.-T. https://orcid.org/0000-0003-2412-7092 Kim, H. Kirchschlager, F. https://orcid.org/0000-0002-3036-0184 Kobayashi, M.I.N. https://orcid.org/0000-0003-3990-1204 Koch, P.M. https://orcid.org/0000-0003-2777-5861 Kusune, T. Kwon, J. https://orcid.org/0000-0003-2815-7774 Lacaille, K. Law, C.-Y. Lee, C.W. https://orcid.org/0000-0002-3179-6334 Lee, H. Lee, Y.-H. Lee, C.-F. https://orcid.org/0000-0002-3024-5864 Lee, J.-E. https://orcid.org/0000-0003-3119-2087 Lee, S.-S. Li, D. Li, D. Li, G. Li, H.-B. Lin, S.-J. https://orcid.org/0000-0002-6868-4483 Liu, H.-L. https://orcid.org/0000-0003-3343-9645 Liu, T. https://orcid.org/0000-0002-5286-2564 Liu, S.-Y. https://orcid.org/0000-0003-4603-7119 Liu, J. https://orcid.org/0000-0002-4774-2998 Longmore, S. https://orcid.org/0000-0001-6353-0170 Lu, X. https://orcid.org/0000-0003-2619-9305 Lyo, A.-R. Mairs, S. https://orcid.org/0000-0002-6956-0730 Matsumura, M. https://orcid.org/0000-0002-6906-0103 Matthews, B. Moriarty-Schieven, G. https://orcid.org/0000-0002-0393-7822 Nagata, T. Nakamura, F. Nakanishi, H. Ngoc, N.B. https://orcid.org/0000-0002-5913-5554 Ohashi, N. https://orcid.org/0000-0003-0998-5064 Onaka, T. https://orcid.org/0000-0002-8234-6747 Park, G. Parsons, H. Peretto, N. Priestley, F. Pyo, T.-S. Qian, L. Rao, R. Rawlings, J. https://orcid.org/0000-0001-5560-1303 Rawlings, M. https://orcid.org/0000-0002-6529-202X Retter, B. Richer, J. Rigby, A. https://orcid.org/0000-0002-3351-2200 Sadavoy, S. Saito, H. Savini, G. Seta, M. Sharma, E. https://orcid.org/0000-0002-4541-0607 Shimajiri, Y. https://orcid.org/0000-0001-9368-3143 Shinnaga, H. Tahani, M. https://orcid.org/0000-0001-8749-1436 Tamura, M. https://orcid.org/0000-0002-6510-0681 Tang, Y.-W. Tang, X. https://orcid.org/0000-0002-4154-4309 Tomisaka, K. https://orcid.org/0000-0003-2726-0892 Tram, L.N. https://orcid.org/0000-0002-6488-8227 Tsukamoto, Y. Viti, S. Wang, H. https://orcid.org/0000-0003-0746-7968 Wu, J. Xie, J. https://orcid.org/0000-0002-2738-146X Yang, M.-Z. Yen, H.-W. https://orcid.org/0000-0003-1412-893X Yoo, H. https://orcid.org/0000-0002-8578-1728 Yuan, J. Yun, H.-S. https://orcid.org/0000-0001-6842-1555 Zenko, T. Zhang, G. Zhang, Y. https://orcid.org/0000-0002-5102-2096 Zhang, C.-P. https://orcid.org/0000-0002-4428-3183 Zhou, J. https://orcid.org/0000-0003-0356-818X Zhu, L. de Looze, I. André, P. Dowell, C.D. Eden, D. Eyres, S. Falle, S. https://orcid.org/0000-0002-6663-7675 Le Gouellec, V.J.M. Poidevin, F. https://orcid.org/0000-0002-5391-5568 Robitaille, J.-F. https://orcid.org/0000-0001-5079-8573 van Loo, S.
Copyright, Publisher and Additional Information:	© 2023. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Dates:	Published: 14 July 2023 Published (online): 14 July 2023
Institution:	The University of Leeds
Academic Units:	The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mathematics (Leeds) > Applied Mathematics (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Astrophysics (Leeds)
Depositing User:	Symplectic Publications
Date Deposited:	26 Apr 2024 12:34
Last Modified:	26 Apr 2024 12:34
Status:	Published
Publisher:	American Astronomical Society
Identification Number:	10.3847/1538-4357/acd6f2
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:211915

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The JCMT BISTRO Survey: Studying the Complex Magnetic Field of L43

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