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The JCMT BISTRO Survey: Alignment between Outflows and Magnetic Fields in Dense Cores/Clumps
Yen,Hsi-Wei1; Koch,Patrick M.1; Hull,Charles L. H.2,3; Ward-Thompson,Derek4; Bastien,Pierre5; Hasegawa,Tetsuo6; Kwon,Woojin7,8; Lai,Shih-Ping1,9; Qiu,Keping10,11; Ching,Tao-Chung12,13; Chung,Eun Jung14; Coudé,Simon15; Francesco,James Di16,17; Diep,Pham Ngoc18; Doi,Yasuo19; Eswaraiah,Chakali13; Falle,Sam20; Fuller,Gary21; Furuya,Ray S.22,23; Han,Ilseung8,24; Hatchell,Jennifer25; Houde,Martin26; Inutsuka,Shu-ichiro27; Johnstone,Doug16,17; Kang,Ji-hyun8; Kang,Miju8; Kim,Kee-Tae8,24; Kirchschlager,Florian28; Kwon,Jungmi29; Lee,Chang Won8,24; Lee,Chin-Fei1; Liu,Hong-Li30,31,32; Liu,Tie32,33; Lyo,A-Ran8; Ohashi,Nagayoshi1; Onaka,Takashi29,34; Pattle,Kate35; Sadavoy,Sarah36; Saito,Hiro37; Shinnaga,Hiroko38; Soam,Archana15; Tahani,Mehrnoosh39; Tamura,Motohide29,40,41; Tang,Ya-Wen1; Tang,Xindi42; Zhang,Chuan-Peng12,13
2021
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume907Issue:1
AbstractAbstract We compare the directions of molecular outflows of 62 low-mass Class 0 and I protostars in nearby (<450 pc) star-forming regions with the mean orientations of the magnetic fields on 0.05–0.5 pc scales in the dense cores/clumps where they are embedded. The magnetic field orientations were measured using the JCMT POL-2 data taken by the BISTRO-1 survey and from the archive. The outflow directions were observed with interferometers in the literature. The observed distribution of the angles between the outflows and the magnetic fields peaks between 15° and 35°. After considering projection effects, our results could suggest that the outflows tend to be misaligned with the magnetic fields by 50°?±?15° in three-dimensional space and are less likely (but not ruled out) randomly oriented with respect to the magnetic fields. There is no correlation between the misalignment and the bolometric temperatures in our sample. In several sources, the small-scale (1000–3000 au) magnetic field is more misaligned with the outflow than the large-scale magnetic field, suggesting that the small-scale magnetic field has been twisted by the dynamics. In comparison with turbulent MHD simulations of core formation, our observational results are more consistent with models in which the energy densities in the magnetic field and the turbulence of the gas are comparable. Our results also suggest that the misalignment alone cannot sufficiently reduce the efficiency of magnetic braking to enable formation of the observed number of large Keplerian disks with sizes larger than 30–50 au.
KeywordStar formation Star forming regions Protostars Interstellar magnetic fields
DOI10.3847/1538-4357/abca99
Language英语
WOS IDIOP:0004-637X-907-1-abca99
PublisherThe American Astronomical Society
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/60934
Collection中国科学院国家天文台
Corresponding AuthorYen,Hsi-Wei
Affiliation1.Academia Sinica Institute of Astronomy and Astrophysics, 11F of Astro-Math Bldg, 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan; hwyen@asiaa.sinica.edu.tw
2.National Astronomical Observatory of Japan, NAOJ Chile, Alonso de Córdova 3788, Office 61B, 7630422, Vitacura, Santiago, Chile
3.Joint ALMA Observatory, Alonso de Córdova 3107, Vitacura, Santiago, Chile
4.Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE, UK
5.Centre de recherche en astrophysique du Québec & département de physique, Université de Montréal, C.P. 6128 Succ. Centre-ville, Montréal, QC, H3C 3J7, Canada
6.National Astronomical Observatory of Japan, National Institutes of Natural Sciences, Osawa, Mitaka, Tokyo 181-8588, Japan
7.Department of Earth Science Education, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
8.Korea Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Republic of Korea
9.Institute of Astronomy and Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan
10.School of Astronomy and Space Science, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, People’s Republic of China
11.Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210023, People’s Republic of China
12.CAS Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences, People’s Republic of China
13.National Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Chaoyang District, Beijing 100012, People’s Republic of China
14.Department of Astronomy and Space Science, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
15.SOFIA Science Center, Universities Space Research Association, NASA Ames Research Center, Moffett Field, CA 94035, USA
16.NRC Herzberg Astronomy and Astrophysics, 5071 West Saanich Road, Victoria, BC V9E 2E7, Canada
17.Department of Physics and Astronomy, University of Victoria, Victoria, BC V8W 2Y2, Canada
18.Vietnam National Space Center, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam
19.Department of Earth Science and Astronomy, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan
20.Department of Applied Mathematics, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK
21.Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK
22.Tokushima University, Minami Jousanajima-machi 1-1, Tokushima 770-8502, Japan
23.Institute of Liberal Arts and Sciences Tokushima University, Minami Jousanajima-machi 1-1, Tokushima 770-8502, Japan
24.University of Science and Technology, Korea, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
25.Physics and Astronomy, University of Exeter, Stocker Road, Exeter EX4 4QL, UK
26.Department of Physics and Astronomy, The University of Western Ontario, 1151 Richmond Street, London N6A 3K7, Canada
27.Department of Physics, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
28.Department of Physics and Astronomy, University College London, London WC1E 6BT, UK
29.Department of Astronomy, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
30.Department of Astronomy, Yunnan University, Kunming, 650091, People’s Republic of China
31.Departamento de Astronomía, Universidad de Concepción, Av. Esteban Iturra s/n, Distrito Universitario, 160-C, Chile
32.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People’s Republic of China
33.Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People’s Republic of China
34.Department of Physics, Faculty of Science and Engineering, Meisei University, 2-1-1 Hodokubo, Hino, Tokyo 1191-8506, Japan
35.Centre for Astronomy, School of Physics, National University of Ireland Galway, University Road, Galway, Ireland
36.Department for Physics, Engineering Physics and Astrophysics, Queen’s University, Kingston, ON K7L 3N6, Canada
37.Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
38.Department of Physics and Astronomy, Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan
39.Dominion Radio Astrophysical Observatory, Herzberg Astronomy and Astrophysics Research Centre, National Research Council Canada, P.O. Box 248, Penticton, BC V2A 6J9 Canada
40.Astrobiology Center, 2-21-1 Osawa, Mitaka-shi, Tokyo 181-8588, Japan
41.National Astronomical Observatory, 2-21-1 Osawa, Mitaka-shi, Tokyo 181-8588, Japan
42.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, 830011 Urumqi, People’s Republic of China
Recommended Citation
GB/T 7714
Yen,Hsi-Wei,Koch,Patrick M.,Hull,Charles L. H.,et al. The JCMT BISTRO Survey: Alignment between Outflows and Magnetic Fields in Dense Cores/Clumps[J]. The Astrophysical Journal,2021,907(1).
APA Yen,Hsi-Wei.,Koch,Patrick M..,Hull,Charles L. H..,Ward-Thompson,Derek.,Bastien,Pierre.,...&Zhang,Chuan-Peng.(2021).The JCMT BISTRO Survey: Alignment between Outflows and Magnetic Fields in Dense Cores/Clumps.The Astrophysical Journal,907(1).
MLA Yen,Hsi-Wei,et al."The JCMT BISTRO Survey: Alignment between Outflows and Magnetic Fields in Dense Cores/Clumps".The Astrophysical Journal 907.1(2021).
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