PMO OpenIR  > 分子云与恒星形成研究团组
The link between magnetic fields and filamentary clouds: bimodal cloud orientations in the Gould Belt
Li, Hua-bai1,2; Fang, Min3; Henning, Thomas1; Kainulainen, Jouni1
2013-12-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume436Issue:4Pages:3707-3719
AbstractThe 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.
KeywordMagnetic Fields Turbulence Ism: Clouds
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1093/mnras/stt1849
WOS KeywordCOMPRESSIBLE MAGNETOHYDRODYNAMIC TURBULENCE ; MOLECULAR CLOUDS ; STAR-FORMATION ; INTERSTELLAR CLOUDS ; COLUMN DENSITY ; DARK CLOUD ; MILKY-WAY ; TAURUS ; CORES ; GAS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000327798100064
Citation statistics
Cited Times:55[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/9849
Collection分子云与恒星形成研究团组
Affiliation1.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
Recommended Citation
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.
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