Title: | First BISTRO Observations of the Dark Cloud Taurus L1495A-B10: The Role of the Magnetic Field in the Earliest Stages of Low-mass Star Formation |
Authors: | Ward-Thompson, Derek Karoly, Janik Pattle, Kate Whitworth, Anthony Kirk, Jason Berry, David Bastien, Pierre Ching, Tao-Chung Coude, Simon Hwang, Jihye Kwon, Woojin Nakamura, Fumitaka Kirchschlager, Florian Kobayashi, Masato I. N Koch, Patrick M Kusune, Takayoshi Kwon, Jungmi Lacaille, Kevin Law, Chi-Yan Lee, Chang Won Lee, Hyeseung Hasegawa, Tetsuo Lee, Yong-Hee Nakanishi, Hiroyuki Lee, Chin-Fei Lee, Jeong-Eun Li, Dalei Li, Di Li, Guangxing Li, Hua-bai Lin, Sheng-Jun Liu, Hong-Li Tram, Le Ngoc Liu, Tie Liu, Sheng-Yuan Ngoc, Nguyen Bich Liu, Junhao Longmore, Steven Lu, Xing Lyo, A-Ran Mairs, Steve Matsumura, Masafumi Matthews, Brenda Tsukamoto, Yusuke Ohashi, Nagayoshi Onaka, Takashi Park, Geumsook Parsons, Harriet Peretto, Nicolas Archana Soam Priestley, Felix Pyo, Tae-Soo Qian, Lei Rao, Ramprasad Viti, Serena Rawlings, Jonathan Rawlings, Mark Rette, Brendan Richer, John Rigby, Andrew Sadavoy, Sarah Wang, Jia-Wei Saito, Hiro Savini, Giorgio Seta, Masumichi Wang, Hongchi Shimajiri, Yoshito Shinnaga, Hiroko Tahani, Mehrnoosh Tamura, Motohide Tang, Ya-Wen Tang, Xindi Tomisaka, Kohji Wu, Jintai Xie, Jinjin Yang, Meng-Zhe Yen, Hsi-Wei Yoo, Hyunju Fuller, Gary Yuan, Jinghua Lai, Shih-Ping Yun, Hyeong-Sik Zenko, Tetsuya Zhang, Guoyin Zhang, Yapeng Zhang, Chuan-Peng Zhou, Jianjun Zhu, Lei de Looze, Ilse Furuya, Ray Andre, Philippe Dowell, C. Darren Qiu, Keping Eden, David Eyres, Stewart Falle, Sam Le Gouellec, Valentin J. M Poidevin, Frederick Robitaille, Jean-François van Loo, Sven Gledhill, Tim Arzoumanian, Doris Bourke, Tyler L Byun, Do-Young Chen, Huei-Ru Vivien Chen, Wen Ping Chen, Mike Chen, Zhiwei Cho, Jungyeon Choi, Minho Choi, Youngwoo Graves, Sarah Choi, Yunhee Chrysostomou, Antonio Chung, Eun Jung Dai, Sophia Debattista, Victor Di Francesco, James Diep, Pham Ngoc Doi, Yasuo Duan, Hao-Yuan Duan, Yan Greaves, Jane Eswaraiah, Chakali Fanciullo, Lapo Fiege, Jason Fissel, Laura M Franzmann, Erica Friberg, Per Friesen, Rachel Griffin, Matt Gu, Qilao Han, Ilseung Hayashi, Saeko Hoang, Thiem Moriarty-Schieven, Gerald Houde, Martin Hull, Charles L. H Inoue, Tsuyoshi Inutsuka, Shu-ichiro Iwasaki, Kazunari Jeong, Il-Gyo Johnstone, Doug Konyves, Vera Kang, Ji-hyun Kang, Miju Nagata, Tetsuya Kataoka, Akimasa Kawabata, Koji Kemper, Francisca Kim, Jongsoo Kim, Shinyoung Kim, Gwanjeong Kim, Kyoung Hee Kim, Mi-Ryang Kim, Kee-Tae Kim, Hyosung |
Keywords: | Interstellar magnetic fields Molecular clouds Starlight polarization Collapsing clouds Interstellar filaments |
Issue Date: | 1-Apr-2023 |
Publisher: | American Astronomical Society |
Citation: | The Astrophysical Journal, Vol. 946, No. 2, 62 |
Abstract: | We present BISTRO Survey 850 μm dust emission polarization observations of the L1495A-B10 region of the
Taurus molecular cloud, taken at the James Clerk Maxwell Telescope (JCMT). We observe a roughly triangular
network of dense filaments. We detect nine of the dense starless cores embedded within these filaments in
polarization, finding that the plane-of-sky orientation of the core-scale magnetic field lies roughly perpendicular to
the filaments in almost all cases. We also find that the large-scale magnetic field orientation measured by Planck is
not correlated with any of the core or filament structures, except in the case of the lowest-density core. We propose
a scenario for early prestellar evolution that is both an extension to, and consistent with, previous models,
introducing an additional evolutionary transitional stage between field-dominated and matter-dominated evolution,
observed here for the first time. In this scenario, the cloud collapses first to a sheet-like structure. Uniquely, we
appear to be seeing this sheet almost face on. The sheet fragments into filaments, which in turn form cores.
However, the material must reach a certain critical density before the evolution changes from being field dominated
to being matter dominated. We measure the sheet surface density and the magnetic field strength at that transition
for the first time and show consistency with an analytical prediction that had previously gone untested for over
50 yr. |
Description: | Open Access 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. |
URI: | http://hdl.handle.net/2248/8194 |
ISSN: | 1538-4357 |
Appears in Collections: | IIAP Publications
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