S21A0031
S21A0031
We propose to conduct a wide-field near-infrared (JHKs) imaging at an unprecedented depth toward a magnetized archetypal filamentary molecular cloud L781 with Subaru/SWIMS. At present, this object is the only filament whose internal magnetic field has been delineated. We have the magnetic field data of inside/outside the filament taken with the near-infrared polarimetry with the IRSF telescope equipped with the SIRPOL polarimeter. The scientific aim is to reveal detailed density structure of the filament based on the dust extinction measurements using a plenty of background stars. Magnetized filament models can be tested through the comparison of it with the observations of magnetic field and density structure. Kinematical stability of the filament can be estimated based on the filament’s line mass measurements. We search for the substructure, e.g., fibers or a sign of fragmentation for dense core formation, in the filament based on the sensitive dust extinction map with the resolution of 10″ (≈ 1/20 filament width). The origin and formation mechanism of the filament can be distinguished and discussed based on the accurate measurement of the center-to-surface density contrast.
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