Vivien Chen

(National Tsing Hua University)

Filaments are common yet mysterious structures in dense clouds. Their nature and importance awaits to be explored. Are they the main device to transport mass or merely byproducts of turbulence? Most arrays before ALMA cannot reliably deliver kinematics to answer fundamental questions about filaments. The game has now changed with ALMA. One of the unique capability of ALMA is to truthfully image all spatial scales.  Our recent ALMA paper has reported the filamentary accretion flow in IRDC G14.2-0.5.  This project will first investigate the imaging procedure of available methods, e.g. combining in the visibility domain or image domain, and apply to available ALMA data on large-scale structures, such as Science Verification data in Orion KL and M100, as well as our latest ALMA data sets.