Oral Presentation

Pinched magnetic field in a massive and quiescent filament

Author(s): Tie Liu (EAO/JCMT, KASI)

Presenter: Tie Liu (EAO/JCMT, KASI)

Most massive molecular dark clouds are found to be in filamentary form. However, the role of magnetic field in the formation and fragmentation process of filamentary clouds has not been well studied. We observed a massive and quiescent cloud, IRDC G035.39-00.33, with JCMT/POL-2 in polarized 850 micron continuum. A network of filaments is revealed by deep POL-2 observations in this cloud. Magnetic filed is roughly parallel to the main axis of less dense filaments but perpendicular to the main axis of the most massive filament. The most massive filament is still accumulating gas along its main axis, resulting pinched magnetic field at its ends. We also witnessed pinched magnetic field surrounding a starless massive clump, indicating that the starless clump may be under gravitational collapse.