학술논문
Revealing the diverse magnetic field morphologies in Taurus dense cores with sensitive sub-millimeter polarimetry
Document Type
Working Paper
Author
Eswaraiah, Chakali; Li, Di; Furuya, Ray S.; Hasegawa, Tetsuo; Ward-Thompson, Derek; Qiu, Keping; Ohashi, Nagayoshi; Pattle, Kate; Sadavoy, Sarah; Hull, Charles L. H.; Berry, David; Doi, Yasuo; Ching, Tao-Chung; Lai, Shih-Ping; Wang, Jia-Wei; Koch, Patrick M.; Kwon, Jungmi; Kwon, Woojin; Bastien, Pierre; Arzoumanian, Doris; Coudé, Simon; Soam, Archana; Fanciullo, Lapo; Yen, Hsi-Wei; Liu, Junhao; Hoang, Thiem; Chen, Wen Ping; Shimajiri, Yoshito; Liu, Tie; Chen, Zhiwei; Li, Hua-bai; Lyo, A-Ran; Hwang, Jihye; Johnstone, Doug; Rao, Ramprasad; Ngoc, Nguyen Bich; Diep, Pham Ngoc; Mairs, Steve; Parsons, Harriet; Tamura, Motohide; Tahani, Mehrnoosh; Chen, Huei-Ru Vivien; Nakamura, Fumitaka; Shinnaga, Hiroko; Tang, Ya-Wen; Cho, Jungyeon; Lee, Chang Won; Inutsuka, Shu-ichiro; Inoue, Tsuyoshi; Iwasaki, Kazunari; Qian, Lei; Xie, Jinjin; Li, Dalei; Liu, Hong-Li; Zhang, Chuan-Peng; Chen, Mike; Zhang, Guoyin; Zhu, Lei; Zhou, Jianjun; André, Philippe; Liu, Sheng-Yuan; Yuan, Jinghua; Lu, Xing; Peretto, Nicolas; Bourke, Tyler L.; Byun, Do-Young; Dai, Sophia; Duan, Yan; Duan, Hao-Yuan; Eden, David; Matthews, Brenda; Fiege, Jason; Fissel, Laura M.; Kim, Kee-Tae; Lee, Chin-Fei; Kim, Jongsoo; Pyo, Tae-Soo; Choi, Yunhee; Choi, Minho; Chrysostomou, Antonio; Chung, Eun Jung; Tram, Le Ngoc; Franzmann, Erica; Friberg, Per; Friesen, Rachel; Fuller, Gary; Gledhill, Tim; Graves, Sarah; Greaves, Jane; Griffin, Matt; Gu, Qilao; Han, Ilseung; Hatchell, Jennifer; Hayashi, Saeko; Houde, Martin; Kawabata, Koji; Jeong, Il-Gyo; Kang, Ji-hyun; Kang, Sung-ju; Kang, Miju; Kataoka, Akimasa; Kemper, Francisca; Rawlings, Mark; Rawlings, Jonathan; Retter, Brendan; Richer, John; Rigby, Andrew; Saito, Hiro; Savini, Giorgio; Scaife, Anna; Seta, Masumichi; Kim, Gwanjeong; Kim, Kyoung Hee; Kim, Mi-Ryang; Kirchschlager, Florian; Kirk, Jason; Kobayashi, Masato I. N.; Konyves, Vera; Kusune, Takayoshi; Lacaille, Kevin; Law, Chi-Yan; Lee, Sang-Sung; Lee, Yong-Hee; Matsumura, Masafumi; Moriarty-Schieven, Gerald; Nagata, Tetsuya; Nakanishi, Hiroyuki; Onaka, Takashi; Park, Geumsook; Tang, Xindi; Tomisaka, Kohji; Tsukamoto, Yusuke; Viti, Serena; Wang, Hongchi; Whitworth, Anthony; Yoo, Hyunju; Yun, Hyeong-Sik; Zenko, Tetsuya; Zhang, Yapeng; de Looze, Ilse; Dowell, C. Darren; Eyres, Stewart; Falle, Sam; Robitaille, Jean-François; van Loo, Sven
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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.
Comment: 20 pages (10 are main), 5 figures (3 are main), and 3 tables (2 are main); Accepted for its publication in ApJL
Comment: 20 pages (10 are main), 5 figures (3 are main), and 3 tables (2 are main); Accepted for its publication in ApJL