Hub-Filament Systems and Spiral Structures from Cloud to Core Scales
Abstract
We present evidence, from several separate observational studies, that molecular clouds and the clumps and cores within are (sometimes) arranged in a hub-filament morphology with spiral-like features. This arrangementoccurs at multiple scales: from the < 0.05 pc scales of low-mass star-forming cores, to the ~0.5 pc scales of clumps in massive star formation regions, to Giant Molecular Clouds. These structures have appeared in data of well known sources because of the increased sensitivy of new instruments like ALMA or the CSO SHARC-II, or after a detailed combination of single-dish and interferometer data. Reports of such structures may become more common in the near future. Presumably, these structures appear in systems that are dense enough to be prone to gravitational instabilities, and that have a non-negligible angularmomentum.
- Publication:
-
IAU General Assembly
- Pub Date:
- August 2015
- Bibcode:
- 2015IAUGA..2257689G