Oral Presentation
Magnetic Fields from Filamentary Clouds to Hub-Filament System in IC5146 Cloud Complex
Presenter: Jia-Wei Wang (National Tsing Hua University)
Filamentary structures are ubiquitous in molecular clouds, and are expected as birth sites of young stars. Some filamentary clouds are consist of dense main filaments with diffuse striations perpendicular to them, while some filamentary clouds are composed of a dense central hub with several filaments converging to the hub. As part of BISTRO survey, we mapped the magnetic field within a hub-filament system in IC5146 cloud complex using JCMT 850 micron polarization. The results show that the magnetic fields within the hub-filament system are mostly inherited from large scale uniform magnetic fields, but also dragged by the gravity from a nearby dense main filament, suggesting that the hub-filament system is likely formed in magnetically supercritical and sub-Alfvénic conditions.
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