A Tale of Three: Magnetic Fields along the Orion Integral-shaped Filament as Revealed by the JCMT BISTRO Survey

Abstract As part of the B -fields In Star-forming Region Observations survey, we present James Clerk Maxwell Telescope (JCMT) 850 μ m polarimetric observations toward the Orion integral-shaped filament (ISF) that covers three portions known as OMC-1, OMC-2, and OMC-3. The magnetic field threading the ISF seen in the JCMT POL-2 map appears as a tale of three: pinched for OMC-1, twisted for OMC-2, and nearly uniform for OMC-3. A multiscale analysis shows that the magnetic field structure in OMC-3 is very consistent at all the scales, whereas the field structure in OMC-2 shows no correlation across different scales. In OMC-1, the field retains its mean orientation from large to small scales but shows some deviations at small scales. Histograms of relative orientations between the magnetic field and filaments reveal a bimodal distribution for OMC-1, a relatively random distribution for OMC-2, and a distribution with a predominant peak at 90 ∘ for OMC-3. Furthermore, the magnetic fields in OMC-1 and OMC-3 both appear to be aligned perpendicular to the fibers, which are denser structures within the filament, but the field in OMC-2 is aligned along with the fibers. All these suggest that gravity, turbulence, and magnetic field are each playing a leading role in OMC-1, 2, and 3, respectively. While OMC-2 and 3 have almost the same gas mass, density, and nonthermal velocity dispersion, there are on average younger and fewer young stellar objects in OMC-3, providing evidence that a stronger magnetic field will induce slower and less efficient star formation in molecular clouds.

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Publication Details

Journal
The Astrophysical Journal Letters
Published
2024-12-11
DOI
https://doi.org/10.3847/2041-8213/ad93d2
Citations
4
Primary Topic
Astrophysics and Star Formation Studies
Type
article
Field-Weighted Citation Impact
1.33

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A Tale of Three: Magnetic Fields along the Orion Integral-shaped Filament as Revealed by the JCMT BISTRO Survey

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4 citations
The Astrophysical Journal Letters
Astrophysics and Star Formation Studies
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A Tale of Three: Magnetic Fields along the Orion Integral-shaped Filament as Revealed by the JCMT BISTRO Survey

Brenda C. Matthews, Kyoung Hee Kim, Hua-bai Li, Eun Jung Chung, S. A. E. G. Falle, P. André, Xindi Tang, Erica Franzmann, Hyosung Kim, Tie Liu, J. S. Greaves, Brendan Retter, J. M. Kirk, Jinghua Yuan, Jihye Hwang, D. Ward–Thompson, G. A. Fuller, S. Lai, Ilse De Looze, Jean‐François Robitaille, Simon Coudé, F D Priestley, C. D. Dowell, Jungmi Kwon, J. M. C. Rawlings, Tetsuo Hasegawa, Kevin Lacaille, Lapo Fanciullo, Masumichi Seta, S. Van Loo, Shinyoung Kim, Jungyeon Cho, Takashi Onaka, Ji‐hyun Kang, Saeko S. Hayashi, Sarah Graves, Yusuke Tsukamoto, Akimasa Kataoka, V. Könyves, Kohji Tomisaka, A. J. Rigby, Thiem Hoang, Ilseung Han, Patrick M. Koch, Chin‐Fei Lee, Jintai Wu, Huei-Ru Vivien Chen, Yapeng Zhang, Hsi-Wei Yen, Tyler L. Bourke, Takayoshi Kusune, Masato I. N. Kobayashi, Janik Karoly, David J. Eden, Yasuo Doi, Hiro Saito, Pierre Bastien, Per Friberg, Nguyen Bich Ngoc, Laura M. Fissel, Chang Won Lee, David Berry, Ramprasad Rao, Jinjin Xie, Jason Fiege, Rachel Friesen, Chakali Eswaraiah, Xing Lu, N. Peretto, Woojin Kwon, Miju Kang, Tae‐Soo Pyo, Pham Ngoc Diep, Jianjun Zhou, Hongchi Wang, Sang-Sung Lee, Guang-Xing Li, Kate Pattle, D. Arzoumanian, Florian Kirchschlager, Sheng‐Yuan Liu, Chuan-Peng Zhang, Chi-Yan Law, Doug Johnstone, Keping Qiu, Steve Mairs, Sarah Sadavoy, Lei Qian, Yan Duan, Shu‐ichiro Inutsuka, Hyeong-Sik Yun, Hyeseung Lee, James Di Francesco, G. Savini, Geumsook Park, Valentin J. M. Le Gouellec, Tao-Chung Ching, S. Viti, Il-Gyo Jeong, Mi-Ryang Kim, Harriet Parsons, M. Matsumura, John Richer, S. P. S. Eyres, Archana Soam, Motohide Tamura, Qilao Gu, Mark G. Rawlings, Hiroko Shinnaga, F. Poidevin, Hyunju Yoo, Fumitaka Nakamura, T. M. Gledhill, Zhiwei Chen, Ekta Sharma, Koji S. Kawabata, G. H. Moriarty‐Schieven, Kee‐Tae Kim, Mehrnoosh Tahani, Nagayoshi Ohashi, Tsuyoshi Inoue, Wen-Ping Chen, Yoshito Shimajiri, A. P. Whitworth, Gwanjeong Kim, Hao-Yuan Duan, Le Ngoc Tram, Ray S. Furuya, Martin Houde, D. Hoang, K. Iwasaki, Tetsuya Zenko, Jeong‐Eun Lee, Hongli Liu, Jia-Wei Wang, Lei Zhu, Di Li, Yunhee Choi, Jongsoo Kim, Tetsuya Nagata, Junhao Liu, Do‐Young Byun, Sheng-Jun Lin, Young-Woo Choi, Minho Choi, Hiroyuki Nakanishi, Ya‐Wen Tang, Matt Griffin, Antonio Chrysostomou, A-Ran Lyo, Guoyin Zhang, Meng-Zhe Yang, Sophia Dai, Mike Chen
article en
4 citations

Abstract

Abstract As part of the B -fields In Star-forming Region Observations survey, we present James Clerk Maxwell Telescope (JCMT) 850 μ m polarimetric observations toward the Orion integral-shaped filament (ISF) that covers three portions known as OMC-1, OMC-2, and OMC-3. The magnetic field threading the ISF seen in the JCMT POL-2 map appears as a tale of three: pinched for OMC-1, twisted for OMC-2, and nearly uniform for OMC-3. A multiscale analysis shows that the magnetic field structure in OMC-3 is very consistent at all the scales, whereas the field structure in OMC-2 shows no correlation across different scales. In OMC-1, the field retains its mean orientation from large to small scales but shows some deviations at small scales. Histograms of relative orientations between the magnetic field and filaments reveal a bimodal distribution for OMC-1, a relatively random distribution for OMC-2, and a distribution with a predominant peak at 90 ∘ for OMC-3. Furthermore, the magnetic fields in OMC-1 and OMC-3 both appear to be aligned perpendicular to the fibers, which are denser structures within the filament, but the field in OMC-2 is aligned along with the fibers. All these suggest that gravity, turbulence, and magnetic field are each playing a leading role in OMC-1, 2, and 3, respectively. While OMC-2 and 3 have almost the same gas mass, density, and nonthermal velocity dispersion, there are on average younger and fewer young stellar objects in OMC-3, providing evidence that a stronger magnetic field will induce slower and less efficient star formation in molecular clouds.

The Astrophysical Journal LettersVol. 977(2)
National Natural Science Foundation of China, Academia Sinica, Korea Astronomy and Space Science Institute, National Astronomical Observatory of Japan, Science and Technology Facilities Council, Science and Engineering Research Board
Openalex Percentile: Top 19%
Astrophysics and Star Formation Studies
1.33
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