The link between magnetic fields and filamentary clouds: bimodal cloud orientations in the Gould Belt
文献类型：期刊论文
| 作者 | Li, Hua-bai1,2; Fang, Min3 ; Henning, Thomas1; Kainulainen, Jouni1
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2013-12-01 |
| 卷号 | 436期号:4页码:3707-3719 |
| 关键词 | magnetic fields turbulence ISM: clouds |
| ISSN号 | 0035-8711 |
| 英文摘要 | The orientations of filamentary molecular clouds in the Gould Belt and their local intercloud media (ICM) magnetic fields are studied using near-infrared dust extinction maps and optical stellar polarimetry data. These filamentary clouds are a few-to-10 pc in length, and we find that their orientations tend to be either parallel or perpendicular to the mean field directions of the local ICM. This bimodal distribution is not found in cloud simulations with super-Alfvenic turbulence, in which the cloud orientations should be random. ICM magnetic fields that are dynamically important compared to inertial range turbulence and self-gravity can readily explain both field-filament configurations. Previous studies commonly recognize that strong magnetic fields can guide gravitational contraction and result in filaments perpendicular to them, but few discuss the fact that magnetic fields can also channel sub-Alfvenic turbulence to form filaments aligned with them. This strong-field scenario of cloud formation is also consistent with the constant field strength observed from ICM to clouds and is possible to explain the 'hub-filament' cloud structure and the density threshold of cloud gravitational contraction. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | COMPRESSIBLE MAGNETOHYDRODYNAMIC TURBULENCE ; MOLECULAR CLOUDS ; STAR-FORMATION ; INTERSTELLAR CLOUDS ; COLUMN DENSITY ; DARK CLOUD ; MILKY-WAY ; TAURUS ; CORES ; GAS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000327798100064 |
| 公开日期 | 2014-01-08 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/9849]  |
| 专题 | 紫金山天文台_分子云与恒星形成研究团组 |
| 作者单位 | 1.Max Planck Inst Astron, D-69117 Heidelberg, Germany 2.Chinese Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China 3.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Hua-bai,Fang, Min,Henning, Thomas,et al. The link between magnetic fields and filamentary clouds: bimodal cloud orientations in the Gould Belt[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,436(4):3707-3719. |
| APA | Li, Hua-bai,Fang, Min,Henning, Thomas,&Kainulainen, Jouni.(2013).The link between magnetic fields and filamentary clouds: bimodal cloud orientations in the Gould Belt.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,436(4),3707-3719. |
| MLA | Li, Hua-bai,et al."The link between magnetic fields and filamentary clouds: bimodal cloud orientations in the Gould Belt".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 436.4(2013):3707-3719. |
入库方式： OAI收割
来源：紫金山天文台
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