First BISTRO Observations of the Dark Cloud Taurus L1495A-B10: The Role of the Magnetic Field in the Earliest Stages of Low-mass Star Formation
文献类型：期刊论文
| 作者 | Ward-Thompson,Derek6; Karoly,Janik6; Pattle,Kate7; Whitworth,Anthony8; Kirk,Jason6; Berry,David9; Bastien,Pierre10; Ching,Tao-Chung11; Coudé,Simon12,13; Hwang,Jihye14,15 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2023-03-30 |
| 卷号 | 946期号:2页码:62 |
| 关键词 | ammonia spectral map dense cores l1495-b218 filaments forming region mu-m herschel scuba-2 jcmt polarization view |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/acbea4 |
| 产权排序 | 64 |
| 英文摘要 | Abstract We present BISTRO Survey 850 μm dust emission polarization observations of the L1495A-B10 region of the Taurus molecular cloud, taken at the James Clerk Maxwell Telescope (JCMT). We observe a roughly triangular network of dense filaments. We detect nine of the dense starless cores embedded within these filaments in polarization, finding that the plane-of-sky orientation of the core-scale magnetic field lies roughly perpendicular to the filaments in almost all cases. We also find that the large-scale magnetic field orientation measured by Planck is not correlated with any of the core or filament structures, except in the case of the lowest-density core. We propose a scenario for early prestellar evolution that is both an extension to, and consistent with, previous models, introducing an additional evolutionary transitional stage between field-dominated and matter-dominated evolution, observed here for the first time. In this scenario, the cloud collapses first to a sheet-like structure. Uniquely, we appear to be seeing this sheet almost face on. The sheet fragments into filaments, which in turn form cores. However, the material must reach a certain critical density before the evolution changes from being field dominated to being matter dominated. We measure the sheet surface density and the magnetic field strength at that transition for the first time and show consistency with an analytical prediction that had previously gone untested for over 50 yr. |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000982956400001 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/6263]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Ward-Thompson,Derek |
| 作者单位 | 1.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 2.Subaru Telescope, National Astronomical Observatory of Japan, 650 N. A’ohōkū Place, Hilo, HI, 96720, USA 3.Department of Physics and Astronomy, The University of Western Ontario, 1151 Richmond Street, London, N6A 3K7, Canada 4.National Astronomical Observatory of Japan, Alonso de Córdova 3788, Office 61B, Vitacura, Santiago, Chile 5.Joint ALMA Observatory, Alonso de Córdova 3107, Vitacura, Santiago, Chile 6.Jeremiah Horrocks Institute, University of Central Lancashire, Preston, PR1 2HE, UK; DWard-Thompson@uclan.ac.uk 7.Department of Physics and Astronomy, University College London, London, WC1E 6BT, UK 8.School of Physics and Astronomy, Cardiff University, The Parade, Cardiff, CF24 3AA, UK 9.East Asian Observatory, 660 N. A’ohōkū Place, University Park, Hilo, HI, 96720, USA 10.Centre de Recherche en Astrophysique du Québec & Département de Physique, Université de Montréal, C.P. 6128 Succ. Centre-ville, Montréal, QC, H3C 3J7, Canada |
| 推荐引用方式 GB/T 7714 | Ward-Thompson,Derek,Karoly,Janik,Pattle,Kate,et al. First BISTRO Observations of the Dark Cloud Taurus L1495A-B10: The Role of the Magnetic Field in the Earliest Stages of Low-mass Star Formation[J]. The Astrophysical Journal,2023,946(2):62. |
| APA | Ward-Thompson,Derek.,Karoly,Janik.,Pattle,Kate.,Whitworth,Anthony.,Kirk,Jason.,...&van Loo,Sven.(2023).First BISTRO Observations of the Dark Cloud Taurus L1495A-B10: The Role of the Magnetic Field in the Earliest Stages of Low-mass Star Formation.The Astrophysical Journal,946(2),62. |
| MLA | Ward-Thompson,Derek,et al."First BISTRO Observations of the Dark Cloud Taurus L1495A-B10: The Role of the Magnetic Field in the Earliest Stages of Low-mass Star Formation".The Astrophysical Journal 946.2(2023):62. |
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