arXiv · 2103.02219
Revealing the diverse magnetic field morphologies in Taurus dense cores with sensitive sub-millimeter polarimetry
Abstract
We have obtained sensitive dust continuum polarization observations at 850 $\mu$m in the B213 region of Taurus using POL-2 on SCUBA-2 at the James Clerk Maxwell Telescope (JCMT), as part of the BISTRO (B-fields in STar-forming Region Observations) survey. These observations allow us to probe magnetic field (B-field) at high spatial resolution ($\sim$2000 au or $\sim$0.01 pc at 140 pc) in two protostellar cores (K04166 and K04169) and one prestellar core (Miz-8b) that lie within the B213 filament. Using the Davis-Chandrasekhar-Fermi method, we estimate the B-field strengths in K04166, K04169, and Miz-8b to be 38$\pm$14 $\mu$G, 44$\pm$16 $\mu$G, and 12$\pm$5 $\mu$G, respectively. These cores show distinct mean B-field orientations. B-field in K04166 is well ordered and aligned parallel to the orientations of the core minor axis, outflows, core rotation axis, and large-scale uniform B-field, in accordance with magnetically regulated star formation via ambipolar diffusion taking place in K04166. B-field in K04169 is found to be ordered but oriented nearly perpendicular to the core minor axis and large-scale B-field, and not well-correlated with other axes. In contrast, Miz-8b exhibits disordered B-field which show no preferred alignment with the core minor axis or large-scale field. We found that only one core, K04166, retains a memory of the large-scale uniform B-field. The other two cores, K04169 and Miz-8b, are decoupled from the large-scale field. Such a complex B-field configuration could be caused by gas inflow onto the filament, even in the presence of a substantial magnetic flux.
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Chakali Eswaraiah, Di Li, Ray S. Furuya, Tetsuo Hasegawa, Derek Ward-Thompson, Keping Qiu, Nagayoshi Ohashi, Kate Pattle, Sarah Sadavoy, Charles L. H. Hull, David Berry, Yasuo Doi, Tao-Chung Ching, Shih-Ping Lai, Jia-Wei Wang, Patrick M. Koch, Jungmi Kwon, Woojin Kwon, Pierre Bastien, Doris Arzoumanian, Simon Coudé, Archana Soam, Lapo Fanciullo, Hsi-Wei Yen, Junhao Liu, Thiem Hoang, Wen Ping Chen, Yoshito Shimajiri, Tie Liu, Zhiwei Chen, Hua-bai Li, A-Ran Lyo, Jihye Hwang, Doug Johnstone, Ramprasad Rao, Nguyen Bich Ngoc, Pham Ngoc Diep, Steve Mairs, Harriet Parsons, Motohide Tamura, Mehrnoosh Tahani, Huei-Ru Vivien Chen, Fumitaka Nakamura, Hiroko Shinnaga, Ya-Wen Tang, Jungyeon Cho, Chang Won Lee, Shu-ichiro Inutsuka, Tsuyoshi Inoue, Kazunari Iwasaki, Lei Qian, Jinjin Xie, Dalei Li, Hong-Li Liu, Chuan-Peng Zhang, Mike Chen, Guoyin Zhang, Lei Zhu, Jianjun Zhou, Philippe André, Sheng-Yuan Liu, Jinghua Yuan, Xing Lu, Nicolas Peretto, Tyler L. Bourke, Do-Young Byun, Sophia Dai, Yan Duan, Hao-Yuan Duan, David Eden, Brenda Matthews, Jason Fiege, Laura M. Fissel, Kee-Tae Kim, Chin-Fei Lee, Jongsoo Kim, Tae-Soo Pyo, Yunhee Choi, Minho Choi, Antonio Chrysostomou, Eun Jung Chung, Le Ngoc Tram, 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, Koji Kawabata, Il-Gyo Jeong, Ji-hyun Kang, Sung-ju Kang, Miju Kang. 2021-03-03. Revealing the diverse magnetic field morphologies in Taurus dense cores with sensitive sub-millimeter polarimetry. https://doi.org/10.3847/2041-8213/abeb1c
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