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B-fields in Star-forming Region Observations (BISTRO): Magnetic Fields in the Filamentary Structures of Serpens Main

Woojin Kwon Kate Pattle Sarah Sadavoy Charles L. H. Hull Doug Johnstone Derek Ward-Thompson James Di Francesco Patrick M. Koch Ray Furuya Yasuo Doi Valentin J. M. Le Gouellec Jihye Hwang A. -Ran Lyo Archana Soam Xindi Tang Thiem Hoang Florian Kirchschlager Chakali Eswaraiah Lapo Fanciullo Kyoung Hee Kim Takashi Onaka Vera Könyves Ji-Hyun Kang Chang Won Lee Motohide Tamura Pierre Bastien Tetsuo Hasegawa Shih-Ping Lai Keping Qiu David Berry Doris Arzoumanian 1 Tyler L. Bourke Do-Young Byun Wen Ping Chen Huei-Ru Vivien Chen Mike Chen Zhiwei Chen Tao-Chung Ching Jungyeon Cho Yunhee Choi Minho Choi Antonio Chrysostomou Eun Jung Chung Simon Coudé Sophia Dai Pham Ngoc Diep Yan Duan Hao-Yuan Duan David Eden Jason Fiege Laura M. Fissel Erica Franzmann Per Friberg Rachel Friesen Gary Fuller Tim Gledhill Sarah Graves Jane Greaves Matt Griffin Qilao Gu Ilseung Han Jennifer Hatchell Saeko Hayashi Martin Houde Tsuyoshi Inoue Shu-Ichiro Inutsuka Kazunari Iwasaki Il-Gyo Jeong Miju Kang Janik Karoly Akimasa Kataoka Koji Kawabata Francisca Kemper Kee-Tae Kim Gwanjeong Kim Mi-Ryang Kim Shinyoung Kim Jongsoo Kim Jason Kirk Masato I. N. Kobayashi Takayoshi Kusune Jungmi Kwon Kevin Lacaille Chi-Yan Law Chin-Fei Lee Yong-Hee Lee Hyeseung Lee Jeong-Eun Lee Sang-Sung Lee Dalei Li Di Li Hua-Bai Li Sheng-Jun Lin Sheng-Yuan Liu Hong-Li Liu Junhao Liu Tie Liu Xing Lu Steve Mairs Masafumi Matsumura Brenda Matthews Gerald Moriarty-Schieven Tetsuya Nagata Fumitaka Nakamura Hiroyuki Nakanishi Nguyen Bich Ngoc Nagayoshi Ohashi Geumsook Park Harriet Parsons Nicolas Peretto Felix Priestley Tae-Soo Pyo Lei Qian Ramprasad Rao Jonathan Rawlings Mark G. Rawlings Brendan Retter John Richer Andrew Rigby Hiro Saito Giorgio Savini Masumichi Seta Yoshito Shimajiri Hiroko Shinnaga Mehrnoosh Tahani Ya-Wen Tang Kohji Tomisaka Le Ngoc Tram Yusuke Tsukamoto Serena Viti Hongchi Wang Jia-Wei Wang Anthony Whitworth Jintai Wu Jinjin Xie Hsi-Wei Yen Hyunju Yoo Jinghua Yuan Hyeong-Sik Yun Tetsuya Zenko Yapeng Zhang Chuan-Peng Zhang Guoyin Zhang Jianjun Zhou Lei Zhu Ilse De Looze Philippe André C. Darren Dowell Stewart Eyres Sam Falle Jean-François Robitaille 2 Sven Van Loo 
Abstract : We present 850 μm polarimetric observations toward the Serpens Main molecular cloud obtained using the POL-2 polarimeter on the James Clerk Maxwell Telescope as part of the B-fields In STar-forming Region Observations survey. These observations probe the magnetic field morphology of the Serpens Main molecular cloud on about 6000 au scales, which consists of cores and six filaments with different physical properties such as density and star formation activity. Using the histogram of relative orientation (HRO) technique, we find that magnetic fields are parallel to filaments in less-dense filamentary structures where ${N}_{{{\rm{H}}}_{2}} 0.93\times {10}^{22}$ cm-2 (magnetic fields perpendicular to density gradients), while they are perpendicular to filaments (magnetic fields parallel to density gradients) in dense filamentary structures with star formation activity. Moreover, applying the HRO technique to denser core regions, we find that magnetic field orientations change to become perpendicular to density gradients again at ${N}_{{{\rm{H}}}_{2}}\approx 4.6\times {10}^{22}$ cm-2. This can be interpreted as a signature of core formation. At ${N}_{{{\rm{H}}}_{2}}\approx 16\times {10}^{22}$ cm-2, magnetic fields change back to being parallel to density gradients once again, which can be understood to be due to magnetic fields being dragged in by infalling material. In addition, we estimate the magnetic field strengths of the filaments (B POS = 60-300 μG)) using the Davis-Chandrasekhar-Fermi method and discuss whether the filaments are gravitationally unstable based on magnetic field and turbulence energy densities.
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Submitted on : Friday, May 13, 2022 - 2:52:41 PM
Last modification on : Saturday, June 25, 2022 - 3:17:16 AM

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Woojin Kwon, Kate Pattle, Sarah Sadavoy, Charles L. H. Hull, Doug Johnstone, et al.. B-fields in Star-forming Region Observations (BISTRO): Magnetic Fields in the Filamentary Structures of Serpens Main. The Astrophysical Journal, 2022, 926, ⟨10.3847/1538-4357/ac4bbe⟩. ⟨insu-03667469⟩

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