DOI | Resolve DOI: https://doi.org/10.3847/1538-4357/abca99 |
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Author | Search for: Yen, Hsi-WeiORCID identifier: https://orcid.org/0000-0003-1412-893X; Search for: Koch, Patrick M.ORCID identifier: https://orcid.org/0000-0003-2777-5861; Search for: Hull, Charles L. H.ORCID identifier: https://orcid.org/0000-0002-8975-7573; Search for: Ward-Thompson, DerekORCID identifier: https://orcid.org/0000-0003-1140-2761; Search for: Bastien, Pierre; Search for: Hasegawa, TetsuoORCID identifier: https://orcid.org/0000-0003-1853-0184; Search for: Kwon, WoojinORCID identifier: https://orcid.org/0000-0003-4022-4132; Search for: Lai, Shih-PingORCID identifier: https://orcid.org/0000-0001-5522-486X; Search for: Qiu, KepingORCID identifier: https://orcid.org/0000-0002-5093-5088; Search for: Ching, Tao-ChungORCID identifier: https://orcid.org/0000-0001-8516-2532; Search for: Chung, Eun JungORCID identifier: https://orcid.org/0000-0003-0014-1527; Search for: Coudé, SimonORCID identifier: https://orcid.org/0000-0002-0859-0805; Search for: Di Francesco, James1; Search for: Diep, Pham Ngoc; Search for: Doi, YasuoORCID identifier: https://orcid.org/0000-0001-8746-6548; Search for: Eswaraiah, ChakaliORCID identifier: https://orcid.org/0000-0003-4761-6139; Search for: Falle, Sam; Search for: Fuller, GaryORCID identifier: https://orcid.org/0000-0001-8509-1818; Search for: Furuya, Ray S.ORCID identifier: https://orcid.org/0000-0003-0646-8782; Search for: Han, Ilseung; Search for: Hatchell, JenniferORCID identifier: https://orcid.org/0000-0002-4870-2760; Search for: Houde, MartinORCID identifier: https://orcid.org/0000-0003-4420-8674; Search for: Inutsuka, Shu-ichiroORCID identifier: https://orcid.org/0000-0003-4366-6518; Search for: Johnstone, Doug1ORCID identifier: https://orcid.org/0000-0002-6773-459X; Search for: Kang, Ji-hyunORCID identifier: https://orcid.org/0000-0001-7379-6263; Search for: Kang, MijuORCID identifier: https://orcid.org/0000-0002-5016-050X; Search for: Kim, Kee-TaeORCID identifier: https://orcid.org/0000-0003-2412-7092; Search for: Kirchschlager, FlorianORCID identifier: https://orcid.org/0000-0002-3036-0184; Search for: Kwon, JungmiORCID identifier: https://orcid.org/0000-0003-2815-7774; Search for: Lee, Chang Won; Search for: Lee, Chin-FeiORCID identifier: https://orcid.org/0000-0002-3024-5864; Search for: Liu, Hong-LiORCID identifier: https://orcid.org/0000-0003-3343-9645; Search for: Liu, TieORCID identifier: https://orcid.org/0000-0002-5286-2564; Search for: Lyo, A-RanORCID identifier: https://orcid.org/0000-0002-9907-8427; Search for: Ohashi, Nagayoshi; Search for: Onaka, TakashiORCID identifier: https://orcid.org/0000-0002-8234-6747; Search for: Pattle, KateORCID identifier: https://orcid.org/0000-0002-8557-3582; Search for: Sadavoy, SarahORCID identifier: https://orcid.org/0000-0001-7474-6874; Search for: Saito, Hiro; Search for: Shinnaga, HirokoORCID identifier: https://orcid.org/0000-0001-9407-6775; Search for: Soam, ArchanaORCID identifier: https://orcid.org/0000-0002-6386-2906; Search for: Tahani, Mehrnoosh1; Search for: Tamura, MotohideORCID identifier: https://orcid.org/0000-0002-6510-0681; Search for: Tang, Ya-WenORCID identifier: https://orcid.org/0000-0002-0675-276X; Search for: Tang, XindiORCID identifier: https://orcid.org/0000-0002-4154-4309; Search for: Zhang, Chuan-PengORCID identifier: https://orcid.org/0000-0002-4428-3183 |
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Affiliation | - National Research Council of Canada. Herzberg Astronomy and Astrophysics
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Format | Text, Article |
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Subject | star formation; star forming regions; protostars; interstellar magnetic fields |
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Abstract | 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. |
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Publication date | 2021-01-22 |
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Publisher | IOP |
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In | |
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Language | English |
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Peer reviewed | Yes |
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Export citation | Export as RIS |
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Report a correction | Report a correction (opens in a new tab) |
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Record identifier | 16f02790-b37a-475f-a09a-c90a47d6c77f |
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Record created | 2023-05-11 |
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Record modified | 2023-05-11 |
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