On the 3D Curvature and Dynamics of the Musca Filament

Abstract Filaments are ubiquitous in the interstellar medium, yet their formation and evolution remain topic of intense debate. In order to obtain a more comprehensive view 3D morphology Musca filament, we model C 18 O(2-1) emission along filament crest with several large-scale velocity field structures. This indicates that is well described by curved cylindrical longitudinal mass inflow its center unless transient structure lifetime ≲0.1 Myr. Gravitational collapse models filaments appear unable explain observed field. To better understand these kinematics, further analyze map at location SOFIA HAWC+ dust polarization observations trace magnetic filament. unveils an organized oriented roughly perpendicular crest. Although also organized, it progressively changes orientation than 90° when laterally crossing thus appears disconnected from strong lateral change over remains unexplained might be associated important motion can kinematics