GBT22B-191

Feeding a super-critical filament in a subsonic core

Abstract

Determining the gas properties from large to small scales is crucial to better understand the formation process of stars and the actual initial conditions for the formation of planets in young disks. Of particular interest is if additional, 'chemically fresh' material is being accreted from nearby gas reservoirs via filaments onto dense star-forming condensations.

To fully characterize the gas properties of these connecting filaments, we proposed GBT/Argus observations of the carbon-chain molecule HC3N towards the isolated dense core Barnard 5 (B5) in the Perseus molecular cloud.

The ~0.5 pc filamentary structure of B5 hosts one Class I protostar along with three bound condensations, making it an excellent target for resolving and studying the gas properties at the relevant scales for star formation.

The proposed observations are crucial to (a) identify clear lanes of material infalling onto the denser inner regions and (b) set constraints on the gas velocity field and the orientation of the super-critical filaments through radiative transfer modeling. Together with dust continuum and high-resolution molecular line maps obtained by our team, the proposed observations will provide a comprehensive picture of a multiple star-forming filament's dust and gas properties.

Investigators

Name	Institution
Anika Schmiedeke *	Green Bank Observatory
Mara Jos Maureira	Yale University; Max-Planck-Institut für extraterrestrische Physik
Dominique Segura-Cox	Illinois at Urbana-Champaign, University of; Max-Planck-Institut für extraterrestrische Physik; Rochester, University of; Texas at Austin, University of
Jaime Pineda	Max-Planck-Institut für extraterrestrische Physik

* indicates the PI