Dissecting the filamentary structure embedded in the subsonic region of Barnard 5


Dr. Anika Schmiedeke(MPE, Garching, Germany)

10 am; May 3, 2021

Filaments are ubiquitous in the interstellar medium. In dust emission especially the Herschel Space Observatory revealed elongated filamentary structures with lengths ranging from 0.5 pc up to several tens of pc. These filaments host most of the dense cores -- the birthplaces of stars, with bound ones located predominantly in filaments with transcritical to super-critical masses per unit length. Studies using molecular line observations have also identified filamentary structures, typically shorter than those seen by Herschel and having masses per unit length close to or below the stability value. In this talk I will present our detailed characterization of two ~0.3 pc long highly super-critical filamentary structures found within the subsonic region of Barnard 5. This study includes the characterization of physical parameters as a function of location along the filaments. Finally I will touch on ongoing work that uses multi-tracer interferometric observations, to characterize the kinematics onto the filaments as well as along the filaments onto the embedded fragments.

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