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arXiv · 2411.01960

The JCMT BISTRO Survey: The Magnetic Fields of the IC 348 Star-forming Region

Youngwoo Choi·Woojin Kwon·Kate Pattle·Doris Arzoumanian·Tyler L. Bourke·Thiem Hoang·Jihye Hwang·Patrick M. Koch·Sarah Sadavoy·Pierre Bastien·Ray Furuya·Shih-Ping Lai·Keping Qiu·Derek Ward-Thompson·David Berry·Do-Young Byun·Huei-Ru Vivien Chen·Wen Ping Chen·Mike Chen·Zhiwei Chen·Tao-Chung Ching·Jungyeon Cho·Minho Choi·Yunhee Choi·Simon Coudé·Antonio Chrysostomou·Eun Jung Chung·Sophia Dai·Victor Debattista·James Di Francesco·Pham Ngoc Diep·Yasuo Doi·Hao-Yuan Duan·Yan Duan·Chakali Eswaraiah·Lapo Fanciullo·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·Tetsuo Hasegawa·Martin Houde·Charles L. H. Hull·Tsuyoshi Inoue·Shu-ichiro Inutsuka·Kazunari Iwasaki·Il-Gyo Jeong·Doug Johnstone·Janik Karoly·Vera Könyves·Ji-hyun Kang·Kevin Lacaille·Chi-Yan Law·Chang Won Lee·Hyeseung Lee·Chin-Fei Lee·Jeong-Eun Lee·Sang-Sung Lee·Dalei Li·Di Li·Guangxing Li·Hua-bai Li·Sheng-Jun Lin·Hong-Li Liu·Tie Liu·Sheng-Yuan Liu·Junhao Liu·Steven Longmore·Xing Lu·A-Ran Lyo·Steve Mairs·Masafumi Matsumura·Brenda Matthews·Gerald Moriarty-Schieven·Tetsuya Nagata·Fumitaka Nakamura·Hiroyuki Nakanishi·Nguyen Bich Ngoc·Nagayoshi Ohashi·Takashi Onaka·Geumsook Park·Harriet Parsons·Nicolas Peretto·Felix Priestley·Tae-Soo Pyo·Lei Qian·Ramprasad Rao·Jonathan Rawlings·Mark Rawlings·Brendan Retter·John Richer·Andrew Rigby
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Abstract

We present 850 $\mu$m polarization observations of the IC 348 star-forming region in the Perseus molecular cloud as part of the B-fields In STar-forming Region Observation (BISTRO) survey. We study the magnetic properties of two cores (HH 211 MMS and IC 348 MMS) and a filamentary structure of IC 348. We find that the overall field tends to be more perpendicular than parallel to the filamentary structure of the region. The polarization fraction decreases with intensity, and we estimate the trend by power-law and the mean of the Rice distribution fittings. The power indices for the cores are much smaller than 1, indicative of possible grain growth to micron size in the cores. We also measure the magnetic field strengths of the two cores and the filamentary area separately by applying the Davis-Chandrasekhar-Fermi method and its alternative version for compressed medium. The estimated mass-to-flux ratios are 0.45-2.20 and 0.63-2.76 for HH 211 MMS and IC 348 MMS, respectively, while the ratios for the filament is 0.33-1.50. This result may suggest that the transition from subcritical to supercritical conditions occurs at the core scale ($\sim$ 0.05 pc) in the region. In addition, we study the energy balance of the cores and find that the relative strength of turbulence to the magnetic field tends to be stronger for IC 348 MMS than HH 211 MMS. The result could potentially explain the different configurations inside the two cores: a single protostellar system in HH 211 MMS and multiple protostars in IC 348 MMS.

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Youngwoo Choi, Woojin Kwon, Kate Pattle, Doris Arzoumanian, Tyler L. Bourke, Thiem Hoang, Jihye Hwang, Patrick M. Koch, Sarah Sadavoy, Pierre Bastien, Ray Furuya, Shih-Ping Lai, Keping Qiu, Derek Ward-Thompson, David Berry, Do-Young Byun, Huei-Ru Vivien Chen, Wen Ping Chen, Mike Chen, Zhiwei Chen, Tao-Chung Ching, Jungyeon Cho, Minho Choi, Yunhee Choi, Simon Coudé, Antonio Chrysostomou, Eun Jung Chung, Sophia Dai, Victor Debattista, James Di Francesco, Pham Ngoc Diep, Yasuo Doi, Hao-Yuan Duan, Yan Duan, Chakali Eswaraiah, Lapo Fanciullo, 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, Tetsuo Hasegawa, Martin Houde, Charles L. H. Hull, Tsuyoshi Inoue, Shu-ichiro Inutsuka, Kazunari Iwasaki, Il-Gyo Jeong, Doug Johnstone, Janik Karoly, Vera Könyves, Ji-hyun Kang, Kevin Lacaille, Chi-Yan Law, Chang Won Lee, Hyeseung Lee, Chin-Fei Lee, Jeong-Eun Lee, Sang-Sung Lee, Dalei Li, Di Li, Guangxing Li, Hua-bai Li, Sheng-Jun Lin, Hong-Li Liu, Tie Liu, Sheng-Yuan Liu, Junhao Liu, Steven Longmore, Xing Lu, A-Ran Lyo, Steve Mairs, Masafumi Matsumura, Brenda Matthews, Gerald Moriarty-Schieven, Tetsuya Nagata, Fumitaka Nakamura, Hiroyuki Nakanishi, Nguyen Bich Ngoc, Nagayoshi Ohashi, Takashi Onaka, Geumsook Park, Harriet Parsons, Nicolas Peretto, Felix Priestley, Tae-Soo Pyo, Lei Qian, Ramprasad Rao, Jonathan Rawlings, Mark Rawlings, Brendan Retter, John Richer, Andrew Rigby. 2024-11-04. The JCMT BISTRO Survey: The Magnetic Fields of the IC 348 Star-forming Region. https://arxiv.org/abs/2411.01960

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