@article {670930, title = {Dissecting the super-critical filaments embedded in the 0.5 pc subsonic region of Barnard 5}, journal = {arXiv}, volume = {2101}, number = {00248}, year = {2021}, abstract = {We characterize in detail the two ~0.3 pc long filamentary structures found within the subsonic region of Barnard 5. We use combined GBT and VLA observations of the molecular lines NH3(1,1) and (2,2) at a resolution of 1800 au, as well as JCMT continuum observations at 850 and 450\ μm at a resolution of 4400 au and 3000 au, respectively. We find that both filaments are highly super-critical with a mean mass per unit length,\ M/L, of ~80 M⊙\ pc-1, after background subtraction, with local increases reaching values of ~150 M⊙\ pc-1. This would require a magnetic field strength of ~500\ μG to be stable against radial collapse.We extract equidistant cuts perpendicular to the spine of the filament and fit a modified Plummer profile as well as a Gaussian to each of the cuts. The filament widths (deconvolved FWHM) range between 6500-7000 au (~0.03 pc) along the filaments. This equals ~2.0 times the radius of the flat inner region. We find an anti-correlation between the central density and this flattening radius, suggestive of contraction. Further, we also find a strong correlation between the power-law exponent at large radii and the flattening radius. We note that the measurements of these three parameters fall in a plane and derive their empirical relation. Our high-resolution observations provide direct constraints of the distribution of the dense gas within super-critical filaments showing pre- and protostellar activity.}, url = {https://arxiv.org/abs/2101.00248}, author = {Schmiedeke, Anika and Pineda, Jaime E. and Caselli, Paola and Arce, H{\'e}ctor G. and Gary A Fuller and Goodman, Alyssa A. and Mar{\'\i}a Jos{\'e} Maureira and Stella S. R. Offner and Segura-Cox, Dominique and Daniel Seifried} }