Oral Presentation

Filamentary Network and Magnetic Field Structures Revealed with BISTRO in NGC2264 - Global Properties and Local Magneto-Gravitational Configurations

Author(s): Jia-Wei Wang (ASIAA), Patrick Koch (ASIAA), BISTRO consortium

Presenter: Jia-Wei Wang (ASIAA)

We report 850-micron continuum polarization observations toward the filamentary high-mass star-forming region NGC 2264, taken as part of the BISTRO large program on the JCMT. These data reveal a well-structured non-uniform magnetic field in the NGC 2264C and 2264D regions with a prevailing orientation around 30 degree. We present an analysis scheme that utilizes the locally resolved magnetic field structures, together with the locally measured gravitational vector field and the extracted filamentary network. From this, we infer statistical trends showing that this network consists of two main groups of filaments approximately perpendicular to one another. Additionally, gravity shows one dominating converging direction that is
roughly perpendicular to one of the filament orientations, which is suggestive of mass accretion along this direction. Beyond these statistical trends, we identify two types of filaments. The type-I filament is perpendicular to the magnetic field with local gravity transitioning from parallel to perpendicular to the magnetic field from the outside to the filament ridge. The type-II filament is parallel to the magnetic field and local gravity. We interpret these two types of filaments as originating from the competition between radial collapsing, driven by filament self-gravity, and the longitudinal collapsing, driven by the region's global gravity.